Defogger Always On - Rear Window
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
Defogger Always On - Rear Window
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Defogger Schematics Connector End View Reference: Master Electrical Component List |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 |
|
Go to Step 5 | Go to Step 3 |
| 3 | Using a test lamp, probe between the REAR WINDOW DEFOGGER relay battery positive voltage coil supply circuit and the REAR WINDOW DEFOGGER relay context circuit. Does the test lamp illuminate? |
Go to Step 4 | Go to Step 6 |
| 4 | Test for a short to ground in the REAR WINDOW DEFOGGER relay control circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 8 | Go to Step 7 |
| 5 | Repair a short to battery positive voltage in the rear defog element supply voltage circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 8 | - |
| 6 | Replace the REAR WINDOW DEFOGGER relay. Refer to Relay Replacement (Within an Electrical Center)
or Relay Replacement (Attached to Wire Harness)
in Wiring Systems. Did you complete the replacement? |
Go to Step 8 | - |
| 7 | Replace the body control module (BCM). Refer to Control Module References
in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? |
Go to Step 8 | - |
| 8 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |