REAR DEFOGGER RELAY CONTROL CIRCUIT SHORT TO VOLTAGE
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
With the ignition on.
- Set Condition:
When the BCM detects unwanted voltage on the rear window defogger control circuit.
| Possible Causes |
| CODE ACTIVE |
| REAR DEFOGGER RELAY SHORTED |
| JUNCTION BLOCK - REAR DEFOGGER RELAY CONTROL CIRCUIT SHORT TO VOLTAGE |
| BODY CONTROL MODULE |
Diagnostic Test
1.CHECK TROUBLE CODEDoes the scan tool display REAR WINDOW DEFOGGER RELAY CONTROL CIRCUIT SHORT TO VOLTAGE?
Yes
- Go To2
No
- Problem is intermittent and not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors and repair as necessary.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
2.RELAY SHORTED
Does the scan tool display REAR WINDOW DEFOGGER RELAY CONTROL CIRCUIT SHORT TO VOLTAGE?
Yes
- Go To3
No
- Replace the original relay.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
3.JUNCTION BLOCK - REAR WINDOW DEFOGGER RELAY CONTROL CIRCUIT SHORT TO VOLTAGE
NOTE: Ensure the Junction Block connectors are reconnected at this time.
Is there any voltage present?
Yes
- Replace the Junction Block.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Replace the Body Control Module.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).