Fiat Lancia Alfa Romeo 3 pin to OBD OBD2 Diagnostic adapter lead cable

Pinout:

FIAT OBD2 famale ===== ===========

1 to 7 K 2 to 4/5 GNd

3 to 15 L 16 ---- red clip (Power)

on the 16 pin obd2 connector use the following pins4- chassis ground (connect to ground on 3 pin connector, or any good chassis earth)5- signal ground (connect to black wire pin on 3 pin connector)7- k line (connect to white wire pin on 3 pin connector)16- 12vDC (connect to battery positive terminal)