Troubleshooting

Table 74
Troubleshooting Test Steps
Values Results
1. Test the Circuit
A. Turn the keyswitch from OFF to ON in order to test the circuit.
Watch the lamp during the test.
Circuit test Result: The lamp does not illuminate.
Troubleshoot any active codes before continuing with this
procedure.
Proceed to Test Step 2.
Result: The lamp illuminates.
There is a problem with the wiring if the problem is inter-
mittent. Troubleshoot the wiring by referring to the electri-
cal schematic for the application.
STOP
2. Check the Bulb
Replace the bulb with a bulb that is known to be good. Test the cir-
cuit again.
Bulb Result: The lamp illuminates. The problem is resolved.
STOP
Result: The lamp does not illuminate. The bulb is OK.
The +Battery or the ground is not present at the lamp. Re-
fer to the electrical schematic.
Troubleshoot the wiring by referring to the electrical sche-
matic if the lamp output is programmed to a J1939
device.
Proceed to Test Step 3 if the lamp output is programmed
to a J1/P1 terminal..
3. Troubleshoot the Wiring for the Lamp
Check the wiring for an open circuit. Pay particular attention to pos-
sible problems with electrical connectors.
Lamp wiring Result: There is an open circuit in the wiring for the lamp.
Make the necessary repairs.
STOP
Result: The wiring for the lamp is OK.
Contact the Dealer Solution Network (DSN).
i06014480
Injector Data Incorrect - Test
This procedure covers the following codes:
Table 75
Diagnostic Trouble Codes for ““Injector Data Incorrect””
J1939 Code Description Notes
(continued)
UENR0612-07 149
Circuit Tests
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