Diagnostic Aids
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- Test the fog lamp switch for sticking in the ON position.
- Perform a visual inspection for loose or poor connections at all related components. Refer to TESTING FOR INTERMITTENT CONDITIONS AND POOR CONNECTIONS in Wiring Systems.
DTC B2527
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Fog Lights Schematics | |||
| 1 | Did you perform the Lighting Systems Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 |
|
Go to Step 3 | Go to Step 4 |
| 3 |
|
Go to Diagnostic Aids | Go to Step 4 |
| 4 |
|
Go to Step 7 | Go to Step 5 |
| 5 | Test the signal circuit of the front fog lamp switch for a short to ground. Refer to CIRCUIT TESTING
and WIRING REPAIRS
in Wiring Systems. Did you find and correct the condition? |
Go to Step 10 | Go to Step 6 |
| 6 | Inspect for poor connections at the harness connector of the Body Control Module (BCM). Refer to CIRCUIT TESTING
and WIRING REPAIRS
in Wiring Systems. Did you find and correct the condition? |
Go to Step 10 | Go to Step 8 |
| 7 | Inspect for poor connections at the harness connector of the front fog lamp switch. Refer to CIRCUIT TESTING
and WIRING REPAIRS
in Wiring Systems. Did you find and correct the condition? |
Go to Step 10 | Go to Step 9 |
| 8 |
IMPORTANT:
Perform the setup procedure for the BCM. Replace the body control module (BCM). Refer to BODY CONTROL MODULE REPLACEMENT
in Body Control System.Did you complete the replacement? |
Go to Step 10 | - |
| 9 | Replace the front fog lamp switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? |
Go to Step 10 | - |
| 10 |
|
Go to Step 2 | System OK |