Fog Lamps Always On
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.
Fog Lamps Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Fog Lights 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 |
| 2 |
|
Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections |
| 3 | Disconnect the FOG LP relay. Did the fog lamps turn OFF? |
Go to Step 4 | Go to Step 8 |
| 4 |
|
Go to Step 5 | Go to Step 10 |
| 5 | Disconnect the body control module (BCM) connector C3. Do the fog lamps remain illuminated? |
Go to Step 6 | Go to Step 9 |
| 6 | Disconnect the BCM connector C1. Do the fog lamps remain illuminated? |
Go to Step 7 | Go to Step 12 |
| 7 | Test for a short to ground in the fog lamp relay control circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 13 | Go to Step 11 |
| 8 | Repair a short to battery positive voltage in the fog lamp voltage supply circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you complete the repair? |
Go to Step 13 | - |
| 9 | Repair a short to ground in the fog lamp switch signal circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you complete the repair? |
Go to Step 13 | - |
| 10 | Replace the lamp switch assembly. Refer to Headlamp Switch Replacement . Did you complete the repair? |
Go to Step 13 | - |
| 11 | Replace the FOG LP relay. Refer to Relay Replacement (Within an Electrical Center)
or Relay Replacement (Attached to Wire Harness)
. Did you complete the replacement? |
Go to Step 13 | - |
| 12 | Replace the BCM. Refer to Control Module References
for replacement, setup and programming. Did you complete the replacement? |
Go to Step 13 | - |
| 13 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |