Jeep Wiring diagrams

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    WIRING DIAGRAMS

    C O N T E N T S

    page page

    COMPONENT IDENTIFICATION . . . . . . . . . . . . . 11GENERAL INFORMATION . . . . . . . . . . . . . . . . . . 1

    SPLICE LOCATIONS . . . . . . . . . . . . . . . . . . . . . 26WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . 35

    GENERAL INFORMATION

    INDEX

    page page

    Circuit Identification . . . . . . . . . . . . . . . . . . . . . . . . 2Component Identification . . . . . . . . . . . . . . . . . . . . 2Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Harness Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Locating A System . . . . . . . . . . . . . . . . . . . . . . . . . 2Modules and Controllers . . . . . . . . . . . . . . . . . . . . 5

    Secondary Ignition Wiring . . . . . . . . . . . . . . . . . . . . 1Splice Locations . . . . . . . . . . . . . . . . . . . . . . . . . . 3Symbols, Fuses, and Relays . . . . . . . . . . . . . . . . . 5Troubleshooting Wiring Problems . . . . . . . . . . . . . . 3Wire Code Identification . . . . . . . . . . . . . . . . . . . . . 2Wiring Diagram Sheets and Indexes . . . . . . . . . . . . 1

    The wiring diagrams conta in the latest informat ion

    at the time of publication.

    Throughout t his group references may be made to a

    particular vehicle by letter or number designation. A

    chart showing the breakdown of these designations is

    included in the Introduction Section at the front of

    this service m anu al.

    SECONDARY IGNITION WIRINGSecondary ignition wiring is shown in Figs 1 and 2.

    For additional information on ignition systems or dis-

    t r i bu t o r op e r a t ion r e fe r t o G r ou p 8 D I gn i t ion S ys -

    tems.

    WIRING DIAGRAM SHEETS AND INDEXEST h e w ir i n g d i a gr a m s h e et s a r e or g a n iz ed t o s h o w

    s ys t e m s r e la t i n g t o t h e b a s ic v e h icl e a n d a l l o f i t s

    options. Add-on or non-factory options are not cov-ered. Diagram pages are identified by a sheet nu mber

    which is located at the lower right or left hand corner

    of each sheet. P a g e n u m b e r s a t t h e t o p o f e a c h

    p a g e d o n o t a p p l y t o d i a g r a m s h e e t s .

    Diagram sheets show all information relating to the

    system. This includes feeds, grounds, switch internal

    circuity, connectors, splices, and pin identification for

    controllers and modules.

    I n ce r t a in i n st a n c es a w ir e m a y b e r e fe r en ce d t o

    a n o t h e r s h e e t . W h e n t h i s h a p p e n s , t h e w i r e w i l l b e

    Fig. 1 Secondary Ignition Wiring 4.0L

    Fig. 3 Secondary Ignition Wiring 5.2L Engine

    Z WIRING DIAGRAMS 8W - 1

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    i de n t ifi ed a s t o w h a t i t i s i e : fe ed , g r ou n d e t c, a n d

    where it is going (Fig. 3). This has been done to aid in

    the diagnosis of wiring and component problems.

    The index for the diagrams is located at the begin-

    ning. It covers all systems shown in the diagrams and

    is in a lp h a be t ica l or d er. T h e m a in s ys t em a n d a ll

    related components are covered.

    WIRE CODE IDENTIFICATIONE a c h w i r e s h o wn i n t h e d ia g r a m s con t a i n s a cod e

    (Fig. 4) which identifies the main circuit , part of the

    main circuit , gauge of wire, and color. The color is

    shown as a two letter code which can be identified by

    referring to the Wire Color Code Chart (Fig. 5). If the

    w i r e h a s a t r a c e r a n d i t i s a s t a n d a r d c o l o r a n a s t e r -

    isk will follow the main wire color. If t he tra cer is

    non-standard the main wire color will have a slash (/)

    after it followed by the tracer color.

    CIRCUIT IDENTIFICATIONAl l ci r cu i t s i n t h e d ia g r a m s u s e a n a l ph a /n u m e r i c

    code to identify the wire and its function. To identify

    which circuit code applies to a system, refer to th eCircuit Identification Code Chart. This chart shows

    the main circuits only and does not show the second-

    ary codes that may apply to some models.

    LOCATING A SYSTEMTo locate a system or component in the diagrams,

    r e fe r t o t h e a lp h a be t ica l in d ex a t t h e fr on t of t h e

    d ia gr a m s . D et e r m in e t h e d ia gr a m s h ee t n u m b er.

    Sheet numbers are located at the lower right or left

    h a n d cor n e r of e a ch s h e et . P a g e n u m b e r s a t t h e

    t o p o f t h e p a g e d o n o t a p p l y t o d i a g r a m s h e e t s .

    The index identifies the main system and all compo-

    n e n t s t h a t r e l a t e t o t h a t s y s t e m . T h e r e a r e a l s o s e c -

    tions of the index t hat identify specific components

    only (for example modules, lamps, etc.). Refer to a

    components name in the index if you are unclear as to

    what a system may be called.D ia g r a m s h e e t s a r e a r r a n g e d s t a r t i n g w it h t h e b a t -

    tery and fuses. Then working into charging, starting,

    and ignition systems. After this th ey start at the front

    of t h e v eh i cl e a n d w or k t o r e a r of t h e v eh i cl e. T h e

    diagrams end with connector identification pages.

    COMPONENT IDENTIFICATIONWhen looking for a components location on the ve-

    h i cl e r e fe r t o t h e w ir i n g a n d com p on e n t s s e ct i on .

    Fig. 4 Wire Color Code Identification

    Fig. 3 Wiring Diagram Page Example

    Fig. 5 Wire Color Code Chart

    8W - 2 WIRING DIAGRAMS Z

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    This section shows the wire harness routing and the

    components location in the vehicle. To use this section

    refer to the wiring diagrams for the general location

    of the component. Then use the component identifica-

    tion index to locate the proper figure number.

    SPLICE LOCATIONSSplice locations are indicated in the diagrams by a

    diamond with a splice circuit code within i t (Fig. 6

    example 1). If there is more th an one splice per circuit

    a s m a ll b ox w il l b e con n e ct e d t o i t w it h t h e s p li ce

    number in it (Fig. 6 example 2).To locate a splice in the wiring harness determine

    the splice num ber from the diagrams then refer to th e

    splice locat ion index. This section shows th e genera l

    location of the splice in the harness.

    CONNECTORST h e c on n e ct or s s h ow n i n t h e d ia g r a m s h e et s a r e

    viewed from the terminal end unless otherwise speci-

    fied. For viewing bulkhea d, powertra in control mod-

    ule, and transmission control module connectors refer

    t o t h e r e a r o f t h e w i r i n g d i a g r a m s . T h i s a r e a s h o w s

    major connectors and identifies pin and cavity infor-

    mation.

    TROUBLESHOOTING WIRING PROBLEMSWhen troubleshooting wiring problems there are six

    s t e p s w h i c h c a n a i d i n t h e p r o c e d u r e . T h e s t e p s a r e

    listed a nd explained below.

    (1) Verify the pr oblem.

    (2 ) Ve r ify a n y r e la t e d s ym p t om s . D o t h i s b y p e r-

    forming operational checks on components that are in

    t h e s a m e c i r c u i t . R e f e r t o t h e w i r i n g d i a g r a m s f u s e

    application chart.

    (3 ) An a ly ze t h e s ym p t om s . U s e t h e w ir in g d ia -

    grams to determine what the circuit is doing, where

    the problem most l ikely is occurr ing and where t he

    diagnosis will continue.

    (4) Isolate th e problem area.

    (5) Repair the problem.

    (6) Verify pr oper operat ion. For th is st ep check for

    proper operation of all i tems on the circuit repaired.

    Refer to the wiring diagram fuse application chart.

    HARNESS REPAIRWIRING REPAIR

    When replacing or repairing a wire, i t is important

    tha t t he correct gauge be used as shown in t he wiring

    d ia g r a m s . T h e w ir e s m u s t a l so b e h e ld s e cu r e ly i n

    place to prevent damage t o the insulation.

    (1) Disconnect batt ery negat ive cable.

    (2) Remove 1 inch of insulation from each end the

    wire.

    (3) Place a piece of heat shrink tubing over one side

    of the wire. Make sure the tubing will be long enough

    to cover and seal the entire repair area.

    Fig. 6 Wiring Splice Examples

    Z WIRING DIAGRAMS 8W - 3

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    (4 ) S p r ea d t h e s t r a n ds of t h e w ir e a p a r t on e a ch

    part of the exposed wires (Fig. 7 example 1).

    (5 ) P u s h t h e t w o e n ds of w i re t oge t h er u n t il t h e

    s t r a n d s of w i r e a r e cl os e t o t h e i n su l a t ion (F i g. 7

    example 2).

    (6) Twist th e wires together (Fig. 7 exam ple 3).

    (7) Solder the connection together using rosin core

    type solder only. D o n o t u s e a c i d c o r e s o l d e r.(8) Center the h eat shr ink tubing over the joint and

    heat using a heat gun. Heat the joint until the tubing

    is tightly sealed and sealant comes out of both ends of

    the tubing.

    (9) Secure the wire to the existing ones to prevent

    chafing or damage to th e insulation.

    (10) Connect battery and test all affected systems.

    CONNECTOR R