Caterpillar 226B Wiring Diagram

8/2/2019 Caterpillar 226B Wiring Diagram

1/4

Volume 1 of 2: Engine & Chassis

RENR6419-04December2007

Electr ical System

216B:RLL1-6799

216B2:RLL6800-7699

226B:MJH1-10574

226B2:MJH10575-12174

232B:SCH1-2474

232B2:SCH2475-2824

236B:HEN1-6749

236B2:HEN6750-8069

242B:BXM1-4224

242B2:BXM4225-4774

246B:PAT1-UP

247B:MTL1-5074

247B2:MTL5075-5699

248B:SCL1-UP

252B:SCP1-4599

252B2:SCP4600-5409

257B:SLK1-7299

257B2:SLK7300-8299

262B:PDT1-UP

267B:CYC1-UP

268B:LBA1-UP

277B:MDH1-UP

287B:ZSA1-UP

Skid Steer Loaders:216B, 216B2, 226B, 226B2, 232B, 232B2, 236B,236B2, 242B, 242B2, 246B, 248B, 252B, 252B2,262B, 268B

Mult i Terra in Loaders:247B, 247B2, 257B, 257B2, 267B, 277B, 287B

2007 Caterpillar

All RightsReserved

1

2

T

FUSE - Acomponent in an electrical

currentflows through it.

REED SWITCH - Aswitch whose conclosesthe contactsofa normallyopennormallyclosed reed switch.

SENDER - Acomponent thatis used sendermeasures the temperature or

indication to the gauge ofthe tempera

RELAY(Magnetic Switch)- Arelay is

electricity.It has a coil thatmakes anThe electromagnetcan open orclose

CIRCUITBREAKER (C/B)- Acompocircuitif too much currentflowsthroug

and itcan be resetto become partoft

SOLENOID - Asolenoid isan electricIthas a coil thatmakes an electromagelectromagnetcan open orclose a va

AG-C4111-7898

L-3E-

C-C4130-6795

Harness And Wire Electrical

Electrical Schematic Symbo

Single Wire

Connector

SocketPin

AG-C3130-6795

Wire,Cable, orHarness Assembly Identification:

IncludesHarness Identification Lettersand Harness

ConnectorSerialization Codes

1

2

Deutsch connector:

The plug containsall sockets

and the receptacle containsall pins.

PartNumberfor

ConnectorPlug

PlugGround

Connection

325-AG135 PK-14

Circuit

Identification

Number

W ir e C ol or W ir e G au ge

Harnessidentification codeThisexample indicateswire 135 in harness"AG".

T

Normallyopen switch thatwill close with an inc

Normallyopen switch thatis closed due to an aspecificdecrease in thatcondition.

Normallyclosed switch thatwill open with an in

Normallyclosed switch thatis open due to an awith a specificdecrease in thatcondition.

The circle indicatesthatthe componenthas scrfromit.

No circle indicatesthatthe wire cannotbe disco

Thisindicates thatthe componenthas a wire co

Thisindicates thatthe componentdoes nothavbybeing fastened to the machine.

Electrical Schematic Symbol

PressureSymbol

TemperatureSymbol S

Machine Harness Connector And Component Locations

Engine & Platform Component Location

ComponentSchematic

Location

Machine

LocationComponent

Schematic

Location

Machine

Location

Alarm - Backup C-14 16 Relay - Main Power B (A) E-12 45

Alternator (A) C-7 14 Relay - Main Power B (B) G-15 44

Alternator (B) I-10 33 Relay - Main Power C (A) E-12 45

Battery (A) A-8 11 Relay - Main Power C (B) G-15 44

Battery (B) G-11 13 Relay - Main Power D (A) D-12 45

Breaker - Main (A) B-9 45 Relay - Main Power D (B) G-15 44

Breaker - Main (B) H-12 45 Relay - Start (A) D-7 45

Breaker - Roading (A) B-9 45 Relay - Start (B) I-10 45

Breaker -Roading (B) H-12 44 Resistor -DMMLAlternator (A) C-7 14

Coil - Ferrite Asy. C-2 19 Sender - Fuel Level (A) F-12 12

Control -Auxiliary Hydrauli cContr ol F-1 47 Sender -Fuel Level (B) H- 15 46

Control -Operator Interlock H-1 48 Socket -Power +12 Volts F-5 6

Diode - Block (A) A-7 15 Solenoid - (C-) High Flow (A) E-5 8

Diode - Fuel Pump D-15 11 Solenoid - (C-) High Flow (B) C-5 8

Fuses - Block 1 G-5 6 Solenoid - (C+) High Flow (A) E-5 8

Fuses - Block 2 (Work Tools) G-7 6 Solenoid -(C+) High Flow (B) D-5 8

Glow Plugs (A) A-7 15 Solenoid - A1 E-7 8

Glow Plugs (B) G-10 15 Solenoid - A2 E-7 8

Ground - Engine Stud (A) B-7 49 Solenoid - Boost Flow (A) D-5 8

Ground -Engine Stud (B) H-10 49 Solenoid -Cold Start Pump (B) G-10 14

Ground -Lower Frame I-15 21 Solenoid -Continuous Flow (A) D-5 8

Ground -Lower Platform D-4 39 Solenoid -Continuous Flow (B) C-5 8

G ro un d- Up per Fr am e I- 15 21 S ol eno id - Det en tVa lv e( 24 8,2 68 ,Hi gh Fl ow) B -5 1 9

Ground -Upper Fr ame Stud (A) C-12 51 Solenoid -F uel Shutdown (A) B-7 33

Ground -Upper Fr ame Stud (B) F-15 11 Solenoid -F uel Shutdown (B) H-10 14

H an dl e - 1 S W- L H I -1 2 0 S ol en oi d - I mp l Pi lo t( 24 8, 26 8, Hi gh F lo w) A -5 1 9

Handle - 2 SW - LH H-2 20 Solenoid - Implement Pilot C-2 19

Handle - 2 SW - RH D- 1 19 Solenoid - Parking Br ake D-3 39

Ha nd le - 2 S W - RH D- 2 1 9 S ol en oi d - Q ui ck Co up le r ( A) B -1 2 11

Ha nd le - 3 S W/ Ro ll er - RH D- 2 1 9 S ol eno id - Qu ic k Co up le r( B) E -1 5 5 3

Handle - 5 SW -LH I-2 20 Solenoid - Transmission H-3 20

Horn - Forward (A) F-12 51 Solenoid - Two Speed (B) E-6 39

Horn - Forward (B) H-15 52

Lamp - License C-15 16

Lamp -Signal Gr oup C-15 16 Solenoid -Valve Gr pDVTR XR XRMTL (A) B-12 52

L am p- S to p/ Ta il - LH At ta ch me nt C -1 4 1 8

L am p - S to p/ Ta il - RH At ta ch me nt B -1 4 1 7

Motor - Fuel Prime Pump (B) E-15 11 Stud - Power (A) C-9 45

Motor - Starter (A) A-9 10 Stud - Power (B) H-12 44

Motor -Starter (B) G-12 50 Switch -Air Filter Indicator (A) B-12 45

Motor -Water Pump I-8 25 Switch -Air Filter Indicator (B) E-15 44

Relay - (C-) Fuse Block 2 G-8 6 Switch - Backup Pressure H-3 20

Relay -( C+) Fuse Block 2 H-8 6 Switch -Cold Start Thermo Temp (B) G- 10 14

Re la y- (C+ /C- )F us eB lo ck 2 H- 8 6 Sw it ch - Eng in eCo ol an tTe mp er at ur e( A) B -7 1 4

Re la y- (C1 )F us eBl oc k2 G -8 6 Sw it ch - Eng in eCo ol an tTe mp er at ur e( B) H- 10 3 3

Relay -(C2) Fuse Block 2 G-8 6 Switch -Engine Oil Pressure (A) B-7 33

Relay -Boost Flow (A) E-6 6 Switch -Engine Oil Pressure (B) H-10 14

Relay -Cold Start (A) D-7 45 Switch -High Flow (248,268) A-4 19

Relay -Cold Start (B) I- 10 45 Switch -Hydraulic Fi lter Bypass (A) D-12 13

Relay -Fuel Pump D-15 11 Switch -Hydraulic Filter Bypass (B) F-15 54

Re lay - Lo ck ou t( 24 8, 268 ,B oos tF lo w) B -6 7 S wi tc h- Hy dr au li cO il Temp (A ) F -1 2 5 1

Relay -Main Power A(A) E-12 44 Switch -Hydraulic Oil Temp (B) I-15 51

Relay -Main Power A(B) G-15 44

(A)=216B/226/232/242/247/257

52

52Solenoid-ValveGrp DVTRXRXRMTL(B)

268HighFlowF-15

Solenoid-ValveGrp DVTRARCMTL(B)

248HighFlowF-15

(B)=236B/246/248/252/262/267/268/277/287

Engine & Platform Connector Location

ConnectorNumberSchematic

Location

Machine

Location

CONN 1 B-12 , E-14 56

CONN 2 B-14 , B-15 18

CONN 3 C-13 , C-14 13CONN 4 C-12 , C-14 52

CONN 5 B-12 , D-14 46

CONN 6 H-14 55

CONN 7 H-14 34

CONN 8 B-10 , D-13 34

CONN 9 C-10 , E-13 34

CONN 10 E-13 34

CONN 11 C-10 , F-13 51

CONN 12 D-10 , F-13 51

CONN 13 E-10 , G-13 51

CONN 14 E-10 , G-13 51

CONN 15 E-10 , H-13 51

CONN 16 H-9 , I-13 12

CONN 17 F-12 44

CONN 18 F-12 51

CONN 19 I-12 45

CONN 20 F-10 51

CONN 21 C-9 51

CONN 22 G-9 13

CONN 23 I-9 14

CONN 24 C-8 13

CONN 25 I-8 7

CONN 26 TOOL I-7 40

CONN 27 A-6 , D-4 7

CONN 28 B-6 , D-6 7

CONN 29 D-6 39

CONN 30 D-6 , E-6 6

CONN 31 S ERVICE F-5 19

CONN 32 B-5 19

Theconnectorsshowninthi schartareforharnesstoharnessconnectors.

Connectors thatjoinaharnesstoa componentaregeneral l y locatedatornear

thecomponent.SeetheComponentLocationChart.

Engine & Platform Off Machine Switch SpecificationPart No. Function Actuate Deactuate Contact Position

134-0404 H ydrau licFilterBypassSwitch275.8to303.4kPa

(40to44psi)

206.8kPaMIN

(30psiMIN)NormallyOpen

192-0836 BackupPressureSw itch517.0+41.4,- 68.9kPa

(75.0+6.0,- 10.0psi)

386.1+41.4 ,-68 .9kPa

(56.0+6.0,- 10.0psi)NormallyOpen

224-0744 H ighFlow PressureSw itch375.9+37.9,- 58.6kPa

(54.5+5.5, -8.5psi)

263kPaMIN

(38.1psiMIN)NormallyClosed

236-1872 H ydrau licOilTempera tureSw itch1023C

(215.65.4F)

90CMIN

(194FMIN)NormallyOpen

Engine & Platform Resistor,Sender andSolenoid SpecificationsPart No. Component Description Resistance (Ohms)

233-7128 Solenoid: Quick Coupler 6.36 0.4

172-0970 Solenoid: D etent Valve 9.4

185- 4254 Solenoid: A1 & A2ContinuousFlow(HighFlowXPS)

2.20.2

195- 9700 Solenoid:

C +&C -(H ighFlow XPS)

ImplementPilot

Parking Brake

Transmission

100.5

216-0610 Solenoid: T wo Speed 2.2 0.2

22 4- 77 82 S en de r: F ue l( 287 / 267 )Empty:240- 245

Fu ll:28-33


Fu ll:28-33

2 31 -2 10 5 S en de r: F ue l (2 16 B / 22 6 / 23 2B / 2 42 )Empty:240- 250

Fu ll:28-33


Fu ll:28-33

238-9397 Resistor: D MMLALT 120.0 6.0

At roomtemperatureunlessotherwisenoted.

RelatedElectricalService Manuals

Form Number

K 3A A lt er na to r: 2 39 -0 77 2 S EN R5 84 1

R 2 .7 KW E le ct ri c St ar ti ng M ot or : 1 43 -0 53 9 S EN R3 8 28

A ux il ia ry H yd ra ul ic Co nt ro l sy st em : R EN R2 89 3

O pe ra to rI nt erl ock Co nt ro l: R EN R2 86 4

Title

Component Identifiers (CID)

Module Identifier (MID)AuxiliaryHydraulicControl

(MID No. 106)

CID Component

0 0 70 P ar ki ng B ra ke S wi tc h

0 16 8 V ol ta ge F au lt

0 5 98 T wo S pe e d Mo to r So le n oi d

1 1 80 A u xi l ia r y Hy d ra u li c S ol e no i d # 1


1 1 84 A u xi l ia r y Hy d ra u li c S ol e no i d Su p p ly

1 18 7 C o nt in u ou s Fl ow S wi tc h

1 1 88 O p er a to r I n te r lo c k Ov e rr i de S w it c h

1 1 89 A u xi l ia r y Hy d ra u li c s Le v er

1 19 0 A rm B ar / S ea t Sw it ch

1 6 9 4 T w o Sp e e d Mo t o r So l en o id S u p pl y

1 6 95 T wo S pe e d Sw it ch1 9 3 1 H i gh P r e ss u re / H i g h F lo w S o le n oi d

1935 Auxi li aryHydraul i cFlowSelectorSwi tch

1 9 3 9 A u xi l ia r y Hy d ra u li c H ig h F l ow S u p pl y

1940 Auxi li aryHydraul i cHighFlowDiverterSolenoid

1 9 4 2 H i gh P r e ss u re T o ol D e t ec t io n S w it c h

TheCIDisadiagnosti ccodethatindicateswhichc i rcui ti s faul ty .

The MIDisa diagnosticcodethat indicateswhichelectroniccontrol

module

Failure Mode Identifiers (FMI)F MI No . F ail ur e De sc rip tio n

0 D a ta v a l id b u t a b ov e n o rm a l op e r at i on a l r an g e .

1 Dataval idbutbelownormaloperational range.

2 Dataerrati c ,i nterm i ttent,or incorrect.

3 V o lt a g e ab o ve n o r ma l o r s ho r te d h i gh .

4 V o lt a g e be l ow n o r ma l o r s ho r te d l o w.

5 C u rr e nt b e l ow n o r ma l o r o pe n c ir c ui t .

6 C u rr e nt a b o ve n o r ma l o r g ro u n de d c ir c ui t .

7 Mechanicalsystemnotrespondingproper l y.

8 Abnormal frequency,pulsewidth,orper iod.

9 A bn or ma l up da t e.

1 0 A b no r ma l r a te o f c h an g e .

1 1 F a il u re m o d e no t i d en t if i ab l e.

1 2 B a d d ev i ce o r c o mp o n en t .

1 3 O u t o f ca l ib r at i on .

1 4 P a ra m et e r f ai l ur e s.


1 6 P a ra m et e r n ot a v a il a bl e .

1 7 M o du l e n ot r e sp o n di n g.

1 8 S e ns o r su p pl y f a ul t .

1 9 C on d it io n no t me t.


TheFMIisadiagnosti ccodethatindicateswhattypeoffai l urehasoccurred.

2 24 -8 54 4 S en de r: F ue l (2 36 / 2 46 / 2 52 / 2 62 / 2 48 / 2 68 )Empty:240- 250

Fu ll:28-33

CONN 33 B-4 , D-2 19

WireDescriptionWire

NumberW ir e Col or D es cr ipt io n

Wire

NumberWi re C ol or D es cr ip ti on

Power Circuits Lighting Circuits Cont.

101 RD Bat (+) /Main Breaker 608 GN Rear Work Lamp SW /Rear LH &RH Fl oods

6 10 O R F ro nt W or k La mp S W/ L H& R HF lo od s

1 05 R D K ey S ta rt S W/ A UX B le ed O ff S W

6 14 P U P an el Swi tc hL am ps

1 11 Y L M ai n Po we r Re la y Ou tp ut D

618 YL RHStopTailLamp/RHHeadTurnLamp

1 12 P U M ai n Po we r Re la y Ou tp ut A -C

619 GN RoadingLampSW/LH&RHHeadTurnLamp

1 14 R D L H Ha nd le F or wa rd Ho rn S W

6 7 4 B U O pe r at o r In t er l oc k C on tr o l / Ac t io n La mp G r ou p

6 7 6 P U O pe r at o r In t er l oc k C on tr o l / Ac t io n La mp G r ou p

ControlCircuits

1 24 R D H ea te r & HV AC K ey S WR el ay

7 7 9 W H H yd Q u ic k C ou pl e r SW / Q u ic k C ou pl e r So l V al v e

1 25 R D H VA CC on de ns er F an Re la y

7 8 0 P U H yd Q u ic k C ou pl e r SW / Q u ic k C ou pl e r So l V al v e

1 26 P K O pe ra to r In te rl oc k Co nt ro l

7 81 P K L H Ha nd le / 2 Sp ee d Tr i gg er S W

127 OR Col dS ta rt SW

7 82 G Y L H Ha nd le / Wo rk T oo l C1 S W

1 28 P K A UX H yd Co nt ro l / AU X Bl ee d Of f SW

A 75 1 Y L P ow er To ol s Sw it ch

1 34 Y L F ro nt Wo rk in gL am pS W

A 75 2 B R P ow er T o ol s S wi t ch / W at e r Pu mp

1 35 B U R ea rW or ki ng La mp SW

F 7 66 W H L oc k ou t Re l ay / D et e nt V a lv e / O pt r I nt e rl o ck C o nt

1 44 G N B ea co n SW / B ea co n So ck et

1 45 B U P ow er So ck et + 12 Vo lt s

GroundCircuits

G 7 98 P U M ai n P ow er R e la y A- D / M ac h in e Se c ur i ty S y st e m

200 B K Mai nChas si s

H 75 8 B R W or k T oo l ( C+ ) R el a y / (C +) S o le n oi d

2 01 B K O p er a to r I nt e rl o ck C on t ro l / P ar k B ra k e SW

H 75 9 O R W or k T oo l ( C- ) R el a y / (C - ) So l en o id

202 BK Armrest SW

H 79 1 G N R H Ha nd l e WK T L (C +) S W / R el a y (C +) C o il

H 79 2 B R R H Ha nd l e WK T L C1 S W / Re l ay ( C -) C o il

M 73 2 O R S t ar t R el a y / Ma c hi n e Se cu r it y S ys t em C on t ro l

M 73 3 P K T oo l Co n ne c to r / W or k T oo l R el a y (C +/ C- ) O ut p ut

BasicMachineCircuits

8 77 Y L C ol d St ar t Re la y / Gl ow P lu gs

3 04 W H S ta rt er R el ay / S ta rt er

F 8 46 P U R H Ac t io n La mp G r ou p / Ma c hi n e Se c ur i ty S y st em

G 8 48 G N R H Ac t io n La mp G r ou p / Ma c hi n e Se c ur i ty S y st em

94 4 O R Cat Dat aLi nk (+)

3 07 O R K e y St ar t S W / Op e ra t or I n te r lo c k Co nt r ol

94 5 BR Cat Dat aLi nk (- )

3 21 B R B a ck U p P r es s ur e S W / B ac k U p A l ar m

A 95 8 W H O pe r at o r In t er l oc k C on t / P ar k B ra ke S o le no i d

3 22 G Y L H Ha nd l e Fo r wa r d Ho r n SW / H or n J um pe r

E 91 7 W H I mp le me nt L oc ko ut S W

A 3 09 G Y F u el S h ut d ow n So l en o id / D i od e Bl o ck

A 3 46 B U S t ar t R el a y / Ma c hi n e Se c ur i ty S y st em C on t

A 34 7 G N M ai n Po we r Re la y Co il A - D

F 9 05 Y L A ut o L ev e le r S W / Va l ve D VT R AR C MT L 24 8 HF

MonitoringCircuits

G 9 69 Y L P ar k B ra k e So l / O pe r at o r In t er l oc k C on t ro l

G982 PK ImplementLockoutSW/AUXHydControl

G 98 3 G N A rm re st SW / S ea t S W

4 04 Y L L H Ac t io n La mp G p / Hy d O il T e mp er a tu r e SW

4 06 P U L H Ac t io n La mp G p / E ng i ne C oo l Te mp S W

4 36 O R L H Ac t io n La mp G p / H yd r au l ic F i lt e r By p as s S W

K 92 7 B U H yd Q u ic k Co u pl e r SW / Q u ic k Co u pl e r So l en oi d

4 39 Y L R H Ac t io n La mp G P / I mp l em en t L oc k ou t S W

L 98 7 W H C ol d St ar t Re la y / Co ld S ta rt S W

4 40 B R R H Ac t io n La mp G P / Ai r F i lt e r In d ic a to r

L 9 98 O R A 1 & A2 S ol e no i d / AU X Hy d ra ul i c Co nt r ol

4 47 P K R H Ac t io n La mp G P / F ue l L ev e l In d / F ue l S en de r

L 9 99 G N T wo S pe ed S o le no i d / AU X Hy d ra ul i c Co n tr o l

C 44 4 Y L R H Ac t io n La mp G P / Al t er n at or / R e s DM ML A l t

M 90 1 Y L R H Ac t io n La mp I n te r lo c k Ov e rr i de / A UX H y d Co nt

C 45 7 B U S to p Pr es su re S W 1

M 90 6 B U R C 2 Va l ve G r ou p So l en oi d / D io d e

C 46 0 B U T oo l Co nn ec to r / Ju mp er

M 90 7 G Y R C 1 Va l ve G r ou p So l en oi d / D io d e

G 46 5 P K C ol d S ta r t Pu mp / C ol d S ta r t Th e rm o SW P 97 8 G N A 1 So l en o id / A UX H yd r au l ic C on t ro l

H416 GN TransmissionSolenoid/OperatorInterlockControl P 97 9 Y L A 2 So l en o id / A UX H yd r au l ic C on t ro lAccessoryCircuits P 98 0 O R F l ow C on t ro l S ol / A U X Hy d ra u li c C on t ro l

5 00 B R W i pe r Wa s he r SW / Fr o nt W ip er M ot o r

5 01 G N W i pe r Wa s he r SW / Fr o nt W ip er M ot o r

5 06 P U W i pe r W as h er SW / W as h er B ot t le P 98 2 B U L H Ha n dl e 2 S pe ed T r ig ge r S W / AU X Hy d C on t ro l

5 13 O R A / C Co mp r es s or R el a y Ou t pu t / A /C C om p So l P 98 3 G N H i gh F l ow S W / AU X Hy d ra u li c C on t ro l

5 14 P U A / C Co n de n se r F an M ot o r Re l ay O u tp ut / F a ns P 98 4 Y L W or k T oo l R el a y (C + /C - ) Ou t pu t / A UX H y d Co nt

5 36 W H T ur n Si gn al S W /H az ar d SW P 98 6 P U R H Ha nd l e Wo r k To o l A2 S W / AU X Hy d C on t

5 37 G N T ur n Si gn al S W /H az ar d SW / F la sh er P 98 7 G N A UX B l ee d O ff S W / AU X Hy d ra ul i c Co n tr o l

5 49 P K R H Ha nd le / Wo rk T oo l Tr ig ge r SW P 98 8 O R L oc k ou t Re l ay / I M PP i lo t S ol / O p tr I n te r lo c k Co nt

123 WH

BK203

OperatorInterlockControl/

MachineSecuritySystem

RoadingBreaker/StopLampRelay/Roading Lamp SW / Stop Pressure SW /

Flasher

AltOutput(+)/Start Relay/ColdStartRelay

/RoadingBreaker/MainPowerRelayA-D

HighFlowSW/FuelLevelInd /ActionLamp

RD102

109 RD

306 GN

308 YL

TurnSignalSW/RHStopTaillamp/RHHeadTurnLamp/SignalLampGroup

LHStopTailLamp/LHHeadTurnLamp/SignalLampGroup/LicenseLamp

Alternator(R)Term./HourMeter/

MachineSecuritySystemControl

LHActionLampGp/AUXBleedoffSW/EngineOilPressureSW

Key StartSW/Alternator/Res DMMLAlt/MachineSecuritySystemControl

AUXHydControl/HighFlowSW

ImplementLockoutSW/LH& RHHandle/MachineSecuritySystem/DetentValve

606 GY

617 BR

403 GN

405

OperatorInterlockControl/AUXHydControl/ParkBrakeSW

OperatorInterlockCont/TransmissionSolenoid/

ImplementPilotSolenoid

ImplementLockoutSW/OperatorInterlockCont/

AUXHydraulicControl

ArmrestSW/OperatorInterlockControl/

AUXHydraulicControl

SeatSW/OperatorInterlockControl/AUXHydraulicControl

TwoSpeedSolenoid/AUXHydraulicControl/

HighFlowRelay/RHActionLampP981 PU

PUG985

WH

PKF780

PKG984

E918 GN

975

GY

5 67 W H A / C Pr e ss u re S W / Co mp r es s or R e la y Co i l P 99 1 P K H i gh F l ow S W / AU X Hy d ra u li c C on t ro l

A 5 71 P U T oo l C on n ec t or / S p ar e R el a y Fu s e Bl o ck 1 P 99 3 O R L H Ha n dl e C on t F lo w SW / A UX H y dr a ul i c Co nt r ol

C 57 6 B U S t op L am p Re l ay / S t op P r es s ur e S W 1 P 99 4 B U R H Ha nd l e Ro l le r P ow er / A U X Hy dr a ul i c Co nt r ol

LightingCircuits P 99 6 G N R H Ha nd l e Ro l le r S ig n al / A UX H y dr a ul i c Co n tr o l

6 03 P K B ea co n S oc ke t / B ea co n S W P 99 7 B R R H Ha nd l e Ro l le r G ro u nd / A UX H yd r au l ic C on t ro l

T 9 01 Y L F e rr i te C oi l / M ac h in e S ec u ri t y Sy s te m Co nt r ol

T 9 02 P K M SS E x ci t er C o il / M a ch i ne S e cu r it y S ys t em C on t

Y905 YL HighFlowRelay/HighFlowSolenoidYL605

TurnSignalSW/LHStopTaillamp/

LHHeadTurnLamp/SignalLampGroup

604 ORStopLampRelay/RH&LHStopTailLamp/SignalLampGroup

1 80 G N J um pe rD em an dF an

11 7 Y L Q CP LR Au to Le ve l

11 8 G Y P ow er Wi pe rWa sh er

119 PK Power Radio

1 20 Y L P ow er Ba ck up Al ar m

122 BU Misc. Power

11 0 G N P WR Fu el Sh ut Of f

327 PK F uel Pu mp PRM

H 74 6 Y L S ol en oi d De ma nd F an ( +)

H 74 7 B R S ol en oi d De ma nd F an ( -)

J 76 4 B R T em pS en so rG ro un d

R 73 2 B R H yd ra ul ic Te mp . Se ns or

X 73 4 G Y L OC Co de IP, Bi t 2

961 BR OVRD Switch

M 90 4 O R L OC Co de IP, Bi t0

M 90 5 WH L OC Co de IP, Bi t1

N957 PK RX D- COMM #1

N960 OR TX D- COMM #1

N 97 9 G N S ig na lG ND - CO MM # 1

R 99 5 B U C oo la nt T em p. S en so r

Y 95 2 Y L D em an d Fa n Sp ee d Se ns or

6

8

10

11 12

14

15

13

16

17

18

19

20

2125

33

7

40

44

45

46

47

48

49

50

51

5253

54

55

56

6

810

11

12

1415

13

16

1718

19

20

21

25

33

7

4044 45

4647

48

49

50

5152

53

54

55

56


2/4


3/4

2007 Caterpillar

All RightsReserved

Volume 2 of 2: Cab

RENR6419-04December2007

Electr ical System

216B:RLL1-6799

216B2:RLL6800-7699

226B:MJH1-10574

226B2:MJH10575-12174

232B:SCH1-2474

232B2:SCH2475-2824

236B:HEN1-6749

236B2:HEN6750-8069

242B:BXM1-4224

242B2:BXM4225-4774

246B:PAT1-UP

247B:MTL1-5074

247B2:MTL5075-5699

248B:SCL1-UP

252B:SCP1-4599

252B2:SCP4600-5409

257B:SLK1-7299

257B2:SLK7300-8299

262B:PDT1-UP

267B:CYC1-UP

268B:LBA1-UP

277B:MDH1-UP

287B:ZSA1-UP

Skid Steer Loaders:216B, 216B2, 226B, 226B2, 232B, 232B2, 236B,236B2, 242B, 242B2, 246B, 248B, 252B, 252B2,262B, 268B

Mult i Terra in Loaders:247B, 247B2, 257B, 257B2, 267B, 277B, 287B

1

2

T

FUSE - Acomponent in an electrical currentflows through it.

REED SWITCH - Aswitch whose con

closesthe contactsofa normallyopennormallyclosed reed switch.

SENDER - Acomponent thatis used sendermeasures the temperature orindication to the gauge ofthe tempera

RELAY(Magnetic Switch)- Arelay iselectricity.It has a coil thatmakes an

The electromagnetcan open orclose

CIRCUITBREAKER (C/B)- Acompocircuitif too much currentflowsthrougand itcan be resetto become partoft

SOLENOID - Asolenoid isan electric

Ithas a coil thatmakes an electromagelectromagnetcan open orclose a va

AG-C4111-7898

L-3E-

C-C4130-6795

Harness And Wire Electrical

Electrical Schematic Symbo

Single Wire

Connector

SocketPin

AG-C3130-6795

Wire,Cable, orHarness Assembly Identification:

IncludesHarness Identification Lettersand Harness

ConnectorSerialization Codes

1

2

Deutsch connector:

The plug containsall sockets

and the receptacle containsall pins.

PartNumberfor

ConnectorPlug

PlugGroundConnection

325-AG135 PK-14

Circuit

Identification

Number

Wire Color Wire Gauge

Harnessidentification code

Thisexample indicateswire 135 in harness"AG".

T

Normallyopen switch thatwill close with an inc

Normallyopen switch thatis closed due to an aspecificdecrease in thatcondition.

Normallyclosed switch thatwill open with an in

Normallyclosed switch thatis open due to an a

with a specificdecrease in thatcondition.

The circle indicatesthatthe componenthas scrfromit.

No circle indicatesthatthe wire cannotbe disco

Thisindicates thatthe componenthas a wire co

Thisindicates thatthe componentdoes nothavbybeing fastened to the machine.

Electrical Schematic Symbol

PressureSymbol

TemperatureSymbol S

Machine Harness Connector And Component Locations

Attachment & Cab Component Location

ComponentSchematic

Location

Machine

LocationComponent

Schematic

Location

Machine

Location

Action Lamp Group -LH (COSA) G-13 1 Solenoid -Valve Gp RC1 E-1 56

Action Lamp Group -LH (NACD) E-9 1 Solenoid -Valve Gp RC2 E-2 56

Action Lamp Group -RH (COSA) E-13 2 Switch -Armrest (COSA) C-15 24

Action Lamp Group -RH (NACD) F-9 2 Switch -Armrest (NACD) C-11 24

B ea co nA nd Bea co nS oc ke t( CO SA) D -1 3 36 Sw it ch - Au to Lev el er (CO SA ) H- 12 1

Beacon And Beacon Socket (NACD) E-9 36 Swi tch -Auto Leveler (NACD) H-8 1

Bottle - Washer I-7 43 Switch -AUX Hydraulic Mode (COSA) F-12 1

Coil -Ferr ite Asy. (MSS) G-3 21 Switch -AUX Hydraulic Mode (NACD) F-8 1

Co il - MSS Ex ci ter (CO SA ) F -13 1 Sw it ch - AUX Pr es sur eRe lea se (CO SA ) H- 12 1

Coil -MSS Exciter (NACD) F-9 1 Switch -AUX Pressur eRelease (NACD) H- 8 1

Contr ol -Machine Secur ity System H-1 21 Switch -Beacon (COSA) F-12 2

Di ode -Valve Group Remote Control E-1 56 Switch -Cold Start (COSA) G-12 1

Flasher (COSA) F-15 34 Switch - Cold Start (NACD) G-8 1

Ground -Cab (COSA) H-15 34 Switch -Fan On/Off/On (Heater) G-6 20

Ground -Cab (NACD) H-11 34 Switch -Fan On/Off/On (HVAC) E-6 20

Hour Meter (COSA) G-13 1 Switch -Front Working Lamp (COSA) C-12 2

Hour Meter (NACD) G-9 1 Switch -Front Working Lamp (NACD) C-8 2

Indicator -Fuel Level (COSA) E-13 2 Switch -Hazard (COSA) E-12 2

I nd ic at or - Fu el Le vel (NA CD) E -9 2 S wi tc h- HVA CRe fr ig er an tP re ss ur e E -4 4 3

Lamp -Dome (COSA) E-13 2 Switch -Hydraulic Lockout (COSA) E-12 2

Lamp -Dome (NACD) E-9 2 Switch -Hydraulic Lockout (Door) H-5 57

Lamp -Fl ood -LH (COSA) I-12 1 Switch -Hydraul ic Lockout (NACD) E-8 2L am p- Fl oo d- LH (NA CD) I- 8 1 Sw it ch - Hy dr aul ic Qu ic kCo up le r( CO SA ) G -1 2 1

L am p- Fl oo d- RH (CO SA ) B- 12 2 Swi tc h- Hy dr aul ic Qu ic kCo up le r( NA CD ) G -8 1

Lamp - Flood - RH (NACD) B-8 2 Switch - Key Start (COSA) F-13 1

Lamp - Head Turn -LH (Atch) I-1 1 Switch - Key Start (NACD) F-9 1

Lamp -Head Turn -RH (Atch) I-1 2 Switch -Mode Off/On (HVAC) D-7 20

Lamp -Rear Flood -LH (COSA) I-15 3 Switch -Parking Brake (COSA) F-12 1

Lamp -Rear Flood -LH (NACD) I-11 3 Switch -Parking Brake (NACD) F -8 1

L am p- Re ar Fl ood - RH (C OSA ) E -1 5 4 S wi tc h- Rea rWo rk ing La mp (CO SA) C- 12 2

L am p- Re ar Fl ood - RH (N AC D) E -11 4 S wi tc h- Rea rWo rk ing La mp (NA CD) C- 8 2

Motor - Condenser Fan 1& 2 D-4 23 Switch -Roadi ng Lamps (COSA) D- 12 2

Motor -Dbl Blower (Heater) G-6 20 Switch - Seat (COSA) C-15 22

Motor -Dbl Blower (HVAC) E-6 20 Switch - Seat (NACD) C-11 22

Motor - Front Wiper I-5 27 Switch - Stop Pressure 1 H-4 55

Relay -Compressor HVAC E-6 20 Switch - Stop Pressure 2 G-4 55

Relay -Condenser Fan E-6 20 Switch - Tool Power (COSA) H-12 1

Relay -Key Switch (Heater) H-6 20 Switch -Tool Power (NACD) H-8 1

Relay -Key Switch (HVAC) F-6 20 Switch -Turn Signal (COSA) D-12 2

Relay - Stop Lamp H-4 55 Switch - Wiper / Washer I-5 27

Solenoid -HVAC Compressor Clutch E-4 9 Thermostat (HVAC) E-7 20

Attachment& CabConnector Location

ConnectorNumberSchematic

Location

Machine

Location

CONN 4 I-3, I-4 13

CONN 5 H-5 55

CONN 8 G-3 34

CONN 9 F-15 34

CONN 11 G-15 , G-11 34

CONN 12 H-15 , H-11 34

CONN 20 H-6 , F-6 42

CONN 24 E-3 13

CONN 34 H-15 , H-11 , H-3 34

CONN 35 I-7 , I-8, I-13 1

CONN 36 I-3 13

CONN 37 I-6 43

CONN 38 E-4 9

Theconnectorsshowninthischartareforharnesstoharnessconnectors.

Connectors thatjoinaharnesstoacomponentaregeneral l y locatedatornearthe

component.SeetheComponentLocationChart.

RelatedElectricalService Manuals

Form Number

K 3A A lt er na to r: 2 39 -0 77 2 S EN R5 84 1

R 2 .7 KW E le ct ri c St ar ti ng M ot or : 1 43 -0 53 9 S EN R3 8 28

A ux il ia ry H yd ra ul ic Co nt ro l sy st em : R EN R2 89 3

O pe ra to rI nt erl ock Co nt ro l: R EN R2 86 4

Title

Attachment & Cab Off Machine Switch SpecificationPart No. Function Actuate Deactuate Contact Position

1 8 4- 1 56 4 S t op P r es s ur e 1 & 2375.9+37.9,-58.6kPa

(54.5+5.5, -8.5psi)

263 kPa

(38.2psi)NormallyClosed

236-6923 A/C R efrigerantPressure275to1750kPa

(40to255 psi)

--

--NormallyOpen

Withincreasingpressure theclosedconditioncan bemaintainedupto 2800kpa(405psi), withdecreasingpressurethe closed conditioncanbemaintained

downto170kpa (25psi).

Contactpositionat thecontactsofthe harnessconnector.

Resistor,Sender andSolenoid SpecificationsPart No. Component Description Resistance (Ohms)

212-3350 Solenoid: Remote Control 1 3.2 0.22

215-3272 Solenoid: Remote Control 2 4.0 0.28

231-6287 Solenoid: A /C Compressor 10.5

At roomtemperatureunlessotherwisenoted.

Component Identifiers (CID)

Module Identifier (MID)

AuxiliaryHydraulicControl

(MID No. 106)

CID Component

0 0 70 P ar ki ng B ra ke S wi tc h

0 16 8 V ol ta ge F au lt

0 5 98 T wo S pe e d Mo t or S ol en oi d



1 1 84 A u xi l ia r y Hy d ra u li c S ol e no i d Su p p ly

1 18 7 C o nt in u ou s Fl ow S wi tc h

1 1 88 O p er a to r I n te r lo c k Ov e rr i de S w it c h

1 1 89 A u xi l ia r y Hy d ra u li c s Le v er

1 19 0 A rm B ar / S ea t Sw it ch

1 6 9 4 T w o Sp e e d Mo t o r So l en o id S u p pl y

1 6 95 T wo S pe e d Sw it ch

1 9 3 1 H i gh P r e ss u re / H i g h F lo w S o le n oi d

1935 Auxi li aryHydraul i cFlowSelectorSwi tch

1 9 3 9 A u xi l ia r y Hy d ra u li c H ig h F l ow S u p pl y

1940 Auxi li aryHydraul i cHighFlowDiverterSolenoid

1 9 4 2 H i gh P r e ss u re T o ol D e t ec t io n S w it c h

TheCIDisadiagnosti ccodethatindicateswhichc i rcui ti s faul ty .

The MIDisa diagnosticcodethat indicateswhichelectronic control

module

Failure Mode Identifiers (FMI)F MI No . F ail ur e De sc rip ti on

0 D a ta v a l id b u t a b ov e n o rm a l op e ra t io n a l ra n ge .

1 Dataval idbutbelownormaloperational range.

2 Dataerrati c ,i nterm i ttent,or incorrect.

3 V o lt a g e ab o ve n o r ma l o r s ho r te d h i gh .

4 V o lt a g e be l ow n o r ma l o r s ho r te d l o w.

5 C u rr e nt b e l ow n o r ma l o r o pe n c i rc u it .

6 C u rr e nt a b o ve n o r ma l o r g ro u n de d c ir c ui t .

7 Mechanicalsystemnotrespondingproper l y.

8 Abnormal frequency,pulsewidth,orper iod.

9 A bn o rm al u pd at e .

1 0 A b no r ma l r at e o f c h an g e .

1 1 F a il u re m o d e no t i d en t if i ab l e.

1 2 B a d d ev i ce o r c o mp o n en t .

1 3 O u t o f ca l ib r at i on .



1 6 P a ra m et e r n ot a v a il a bl e .

1 7 M o du l e n ot r e sp o n di n g.

1 8 S e ns o r su p pl y f au l t.

1 9 C on di ti on n ot m et .


TheFMIisadiagnosti ccodethatindicateswhattypeoffai l urehasoccurred.

WireDescriptionWire

NumberW ir e Col or D es cr ipt io n

Wire

NumberWi re C ol or D es cr ip ti on

Power Circuits Lighting Circuits Cont.

101 RD Bat (+) /Main Breaker 608 GN Rear Work Lamp SW /Rear LH &RH Fl oods

6 10 O R F ro nt W or k La mp S W/ L H& R HF lo od s

1 05 R D K ey S ta rt S W/ A UX B le ed O ff S W

6 14 P U P an el Swi tc hL am ps

1 11 Y L M ai n Po we r Re la y Ou tp ut D

618 YL RHStopTailLamp/RHHeadTurnLamp

1 12 P U M ai n Po we r Re la y Ou tp ut A -C

619 GN RoadingLampSW/LH&RHHeadTurnLamp

1 14 R D L H Ha nd le F or wa rd Ho rn S W

6 7 4 B U O pe r at o r In t er l oc k C on tr o l / Ac t io n La mp G r ou p

6 7 6 P U O pe r at o r In t er l oc k C on tr o l / Ac t io n La mp G r ou p

ControlCircuits

1 24 R D H ea te r & HV AC K ey S WR el ay

7 7 9 W H H yd Q u ic k C ou pl e r SW / Q u ic k C ou pl e r So l V al v e

1 25 R D H VA CC on de ns er F an Re la y

7 8 0 P U H yd Q u ic k C ou pl e r SW / Q u ic k C ou pl e r So l V al v e

1 26 P K O pe ra to r In te rl oc k Co nt ro l

7 81 P K L H Ha nd le / 2 Sp ee d Tr i gg er S W

127 OR Col dS ta rt SW

7 82 G Y L H Ha nd le / Wo rk T oo l C1 S W

1 28 P K A UX H yd Co nt ro l / AU X Bl ee d Of f SW

A 75 1 Y L P ow er To ol s Sw it ch

1 34 Y L F ro nt Wo rk in gL am pS W

A 75 2 B R P ow er T o ol s S wi t ch / W at e r Pu mp

1 35 B U R ea rW or ki ng La mp SW

F 7 66 W H L oc k ou t Re l ay / D et e nt V a lv e / O pt r I nt e rl o ck C o nt

1 44 G N B ea co n SW / B ea co n So ck et

1 45 B U P ow er So ck et + 12 Vo lt s

GroundCircuits

G 79 8 P U M ai n P ow er R e la y A- D / M ac h in e Se c ur i ty S y st e m

200 B K Mai nChas si s

H 75 8 B R W or k T oo l ( C+ ) R el a y / (C +) S o le n oi d

2 01 B K O p er a to r I nt e rl o ck C on t ro l / P ar k B ra k e SW

H 75 9 O R W or k T oo l ( C- ) R el a y / (C - ) So l en o id

202 BK Armrest SW

H 79 1 G N R H Ha nd l e WK T L (C +) S W / R el a y (C +) C o il

H 79 2 B R R H Ha nd l e WK T L C1 S W / Re l ay ( C -) C o il

M 73 2 O R S t ar t R el a y / Ma c hi n e Se cu r it y S ys t em C on t ro l

M 73 3 P K T oo l Co n ne c to r / W or k T oo l R el a y (C +/ C- ) O ut p ut

BasicMachineCircuits

8 77 Y L C ol d St ar t Re la y / Gl ow P lu gs

3 04 W H S ta rt er R el ay / S ta rt er

F 8 46 P U R H Ac t io n La mp G r ou p / Ma c hi n e Se c ur i ty S y st em

G 8 48 G N R H Ac t io n La m pG r ou p / Ma c hi n e Se c ur i ty S y st e m

94 4 O R Cat Dat aLi nk (+)

3 07 O R K e y St ar t S W / Op e ra t or I n te r lo c k Co nt r ol

94 5 BR Cat Dat aLi nk (- )

3 21 B R B a ck U p P r es s ur e S W / B ac k U p A l ar m

A 95 8 W H O pe r at o r In t er l oc k C on t / P ar k B ra ke S o le no i d

3 22 G Y L H Ha nd l e Fo r wa r d Ho r n SW / H or n J um pe r

E 91 7 W H I mp le me nt L oc ko ut S W

A 3 09 G Y F u el S h ut d ow n So l en o id / D i od e Bl o ck

A 3 46 B U S t ar t R el a y / Ma c hi n e Se c ur i ty S y st em C on t

A 34 7 G N M ai n Po we r Re la y Co il A - D

F 9 05 Y L A ut o L ev e le r S W / Va l ve D VT R AR C MT L 24 8 HF

MonitoringCircuits

G 9 69 Y L P ar k B ra k e So l / O pe r at o r In t er l oc k C on tr o l

G982 PK ImplementLockoutSW/AUXHydControl

G 98 3 G N A rm re st SW / S ea t S W

4 04 Y L L H Ac t io n La mp G p / Hy d O il T e mp er a tu r e SW

4 06 P U L H Ac t io n La mp G p / E ng i ne C oo l Te mp S W

4 36 O R L H Ac t io n La mp G p / H yd r au l ic F i lt e r By p as s S W

K 92 7 B U H yd Q u ic k Co u pl e r SW / Q u ic k Co u pl e r So l en oi d

4 39 Y L R H Ac t io n La mp G P / I mp l em en t L oc k ou t S W

L 98 7 W H C ol d St ar t Re la y / Co ld S ta rt S W

4 40 B R R H Ac t io n La mp G P / Ai r F i lt e r In d ic a to r

L 9 98 O R A 1 & A2 S ol e no i d / AU X Hy d ra ul i c Co nt r ol

4 47 P K R H Ac t io n La mp G P / F ue l L ev e l In d / F ue l S en de r

L 9 99 G N T wo S pe ed S o le no i d / AU X Hy d ra ul i c Co n tr o l

C 44 4 Y L R H Ac t io n La mp G P / Al t er n at or / R e s DM ML A l t

M 90 1 Y L R H Ac t io n La mp I n te r lo c k Ov er r i de / A UX H y d Co nt

C 45 7 B U S to p Pr es su re S W 1

M 90 6 B U R C 2 Va l ve G r ou p So l en oi d / D io d e

C 46 0 B U T oo l Co nn ec to r / Ju mp er

M 90 7 G Y R C 1 Va l ve G r ou p So l en oi d / D io d e

G 46 5 P K C ol d S ta r t Pu mp / C ol d S ta r t Th e rm o SW P 97 8 G N A 1 So l en oi d / A UX H yd r au l ic C on t ro l

H416 GN TransmissionSolenoid/OperatorInterlockControl P 97 9 Y L A 2 So l en oi d / A UX H yd r au l ic C on t ro l

AccessoryCircuits P 98 0 O R F l ow C on t ro l S ol / A U X Hy d ra u li c C on t ro l

5 00 B R W i pe r Wa s he r SW / Fr o nt W ip er M ot o r

5 01 G N W i pe r Wa s he r SW / Fr o nt W ip er M ot o r

5 06 P U W i pe r W as h er SW / W as h er B ot t le P 98 2 B U L H Ha n dl e 2 S pe ed T r ig ge r S W / AU X Hy d C on t ro l

5 13 O R A / C Co mp r es s or R el a y Ou t pu t / A/ C Co mp S ol P 98 3 G N H i gh F l ow S W / AU X Hy d ra u li c C on t ro l

5 14 P U A / C Co n de n se r F an M ot o r Re l ay O u tp ut / F a ns P 98 4 Y L W or k T oo l R el a y (C + /C - ) Ou t pu t / A UX H yd C on t

5 36 W H T ur n Si gn al S W /H az ar d SW P 98 6 P U R H Ha nd l e Wo r k To o l A2 S W / AU X Hy d C on t

5 37 G N T ur n Si gn al S W /H az ar d SW / F la sh er P 98 7 G N A UX B le ed O ff S W/ A UX H yd ra ul ic C on tr ol

5 49 P K R H Ha nd le / Wo rk T oo l Tr ig ge r SW P 98 8 O R L oc ko ut R el ay / I MP P il ot S ol / O pt r In te rl oc k Co nt

123 WH

BK203

OperatorInterlockControl/MachineSecuritySystem

RoadingBreaker/StopLampRelay/Roading Lamp SW / Stop Pressure SW /Flasher

AltOutput(+)/ StartRelay/ColdStartRelay/RoadingBreaker/MainPowerRelayA-D

HighFlowSW/FuelLevelInd /

ActionLamp

RD102

109 RD

306 GN

308 YL

TurnSignalSW/RHStopTaillamp/

RHHeadTurnLamp/SignalLampGroup

LHStopTailLamp/LHHeadTurnLamp/SignalLampGroup/LicenseLamp

Alternator(R)Term./HourMeter/MachineSecuritySystemControl

LHActionLampGp/AUXBleedoffSW/

EngineOilPressureSW

Key StartSW/Alternator/Res DMMLAlt/MachineSecuritySystemControl

AUXHydControl/HighFlowSWImplementLockoutSW/LH& RHHandle/

MachineSecuritySystem/DetentValve

606 GY

617 BR

403 GN

405

OperatorInterlockControl/AUXHydControl/ParkBrakeSW

OperatorInterlockCont/TransmissionSolenoid/ImplementPilotSolenoid

ImplementLockoutSW/OperatorInterlockCont/AUXHydraulicControl

ArmrestSW/OperatorInterlockControl/AUXHydraulicControl

SeatSW/OperatorInterlockControl/AUXHydraulicControl

TwoSpeedSolenoid/AUXHydraulicControl/HighFlowRelay/RHActionLamp

P981 PU

PUG985

WH

PKF780

PKG984

E918 GN

975

GY

5 67 W H A /C P re ss ur e SW / Co mp re ss or R el ay C oi l P 99 1 P K H ig h Fl ow SW / AU X Hy dr au li c Co nt ro l

A 5 71 P U T oo l C on n ec t or / S p ar e R el a y Fu s e Bl o ck 1 P 99 3 O R L H Ha n dl e C on t F lo w SW / A UX H y dr a ul i c Co nt r ol

C 57 6 B U S t op L a mp R el a y / St o p Pr e ss u re S W 1 P 99 4 B U R H Ha nd l e Ro l le r P ow er / A U X Hy dr a ul i c Co nt r ol

LightingCircuits P 99 6 G N R H Ha nd l e Ro l le r S ig n al / A UX H y dr a ul i c Co n tr o l

6 03 P K B ea co n S oc ke t / B ea co n S W P 99 7 B R R H Ha nd l e Ro l le r G ro u nd / A UX H yd r au l ic C on t ro l

T 9 01 Y L F e rr i te C oi l / M ac h in e S ec u ri t y Sy s te m Co nt r ol

T 9 02 P K M SS E x ci t er C o il / M a ch i ne S e cu r it y S ys t em C on t

Y905 YL HighFlowRelay/HighFlowSolenoidYL605

TurnSignalSW/LHStopTaillamp/LHHeadTurnLamp/SignalLampGroup

604 ORStopLampRelay/RH&LHStopTailLamp/

SignalLampGroup

1 80 G N J um pe rD em an dF an

11 7 Y L Q CP LR Au to Le ve l

11 8 G Y P ow er Wi pe rWa sh er

119 PK Power Radio

1 20 Y L P ow er Ba ck up Al ar m

122 BU Misc. Power

11 0 G N P WR Fu el Sh ut Of f

327 PK F uel Pump PRM

H 74 6 Y L S ol en oi d De ma nd F an ( +)

H 74 7 B R S ol en oi d De ma nd F an ( -)

J 76 4 B R T em pS en so rG ro un d

R 73 2 B R H yd ra ul ic T em p. S en so r

X 73 4 G Y L OC Co de IP, Bi t 2

961 BR OVRD Switch

M 90 4 O R L OC Co de IP, Bi t0

M 90 5 WH L OC Co de IP, Bi t1

N957 PK RXD -COMM #1

N960 OR TX D- COMM #1

N 97 9 G N S ig na lG ND - CO MM # 1

R 99 5 B U C oo la nt T em p. S en so r

Y 95 2 Y L D em an d Fa n Sp ee d Se ns or

3

4

9

1

2

20

21

2223

24

27

34

36 4243

56

55

57

3

4

9

1

2

20

21

22

23

24

27

34

36

42

43

57

5556


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Documents

Caterpillar 226B Wiring Diagram