Lighting Chart A-2: Data Circuit Problem: Notes
NOTE:
When all diagnosis and repairs are completed, clear codes and verify operation.
This combination of codes indicates that circuit No. 928 has been shorted to voltage or ground. Chart "A-2" outlines a systematic method to determine which branch of the circuit caused the codes to be set.
NOTE:
The following numbered steps refer to circled numbers on diagnostic chart. See Figure
. For circuit identification, see Figure
.
- Codes set current indicates that the condition is present and is not an intermittent.
- Removing and reinstalling Fuses "L-1", "L-2" and "L-3" assures that all OSM's are reset to the "LIGHTS OFF" status. Disconnecting the dash-to-forward lamp harness connector "DA-FL" will remove the short and allow normal operation of the right rear taillamps only if the short is in the forward lamp harness.
- If the right rear taillamps operate with connector "DA-FL" and the "DA-LEFT TAILLAMP JUMPER" connector removed, then the short is in the "DA-LEFT TAILLAMP JUMPER" or in circuit No. 928G or No. 928H.
- The short must be between connector "DA-FL" and the "DA-LEFT TAIL JUMPER" connector on the BCM side of the data circuit.
- Reconnecting connector "DA-FL" will determine if circuits No. 928G or 928H are suspect for the short.