CLIP 4841454 - Caterpillar

Illustration 1 g01804053
Typical schematic of the circuit for the indicator lamps
Illustration 2 g01804073
Typical example of the pin locations on the P1 connector for the indicator lamps (1) Ground (GND) (2) Ground (GND) (3) Ground (GND) (9) Ground (GND) (10) Ground (GND) (7) Battery (+) (8) Battery (+) (15) Battery (+) (16) Battery (+) (40) Keyswitch (59) Warning lamp (60) Stop lamp (61) PTO lamp (62) Low oil pressure lamp (63) Cold start lampTest Step 1. Inspect Electrical Connectors and Wiring
Turn the keyswitch to the OFF position.
Thoroughly inspect the P1 connector and the lamp connections. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the P1 connector that are associated with the indicator lamps.
Check the screw for the P1 connector for the correct torque of 5.0 N m (44 lb in).
Check the harness for abrasions and for pinch points from the battery to the ECM.Results:
OK - Proceed to Test Step 2.
Not OK - Repair: Repair the connectors or the harness and/or replace the connectors or the harness. Ensure that all of the seals are correctly in place and ensure that the connectors are completely coupled.Verify that the repair eliminates the fault.STOPTest Step 2. Inspect the Lamp, the Fuse and the Power Supply
Disconnect the lamp from the harness. Inspect the lamp in order to determine if the lamp has failed.
Measure the resistance across the two terminals of the lamp. If the resistance is more than 2000 Ohms, the bulb has failed.
Check the battery by connecting a test lamp across the terminal of the battery.Expected Result:The lamp has less than 2000 Ohms and the power supply is OK.Results:
OK - The lamp appears to be operating correctly at this time. Proceed to Test Step 3.
Not OK - Repair: Replace the suspect component or repair the suspect component. Verify that the repairs have eliminated the fault.STOPTest Step 3. Measure the Input to the Lamp at the Lamp Socket
Turn the keyswitch