LINES GP-FUEL 3C8158 - Caterpillar

Illustration 1 g01058271
Thoroughly inspect the J1/P1 connectors. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Illustration 2 g01150718
Pin locations on ECM connector (P1-3) Shutdown switch (P1-27) Engine shutdown override switch (P1-55) − Battery
Remove terminal 27 from the P1 connector.
Connect a jumper wire between terminals P1-27 and P1-65 (-Battery). This will replace the switch circuit with a short circuit.
Turn the keyswitch to the ON position.
Disconnect one end of the jumper wire and connect the end of the jumper wire. Monitor the warning lamp while the jumper wire is disconnected and connected.The warning lamp should illuminate when the jumper wire is connected. The warning lamp should not illuminate when the jumper wire is disconnected.If the warning lamp operates correctly, return the wiring to the original configuration. Repair the circuit for the engine shutdown override switch.If the warning lamp does not operate correctly, repair the circuit for the warning lamp.