KIT-GASKET(F) 3156218 - Caterpillar

Also use this procedure under the following circumstances:
The lamps are not receiving battery voltage.
The lamps are not operating correctly.The following diagnostic lamps are available:
High Exhaust System Temperature (HEST) lamp
Diesel Particulate Filter (DPF) lampThe electronic service tool can be used as a diagnostic aid in order to switch the individual lamps ON and OFF. Note: The diagnostic aid that switches the lamps is contained in the "Override" section in the "diagnostics" menu of the electronic service tool.
Illustration 1 g02456217
Schematic of the circuit for the indicator lamps
Illustration 2 g02456218
Typical example of the pin locations on the P1 connector for the indicator lamps (28) DPF lamp (29) HEST lamp (48) Battery (+) (52) Battery (+) (53) Battery (+) (55) Battery (+) (57) Battery (+) (61) Ground (63) Ground (65) Ground (67) Ground (69) Ground (70) Ignition keyswitchTest 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 6 N m (53 lb in).
Check the harness for abrasions and for pinch points from the battery to the ECM.Results:
OK - Proceed