Rear Fog Lamps Always On
Rear Fog Lamps Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Fog Lights Schematics Connector End View Reference: Lighting Systems Connector End Views or Data Communication Connector End Views |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Verify that the rear fog lamp is always on. Does the rear fog lamp operate normally? |
Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 | Use the scan tool to monitor the rear fog lamp switch input with the switch in the OFF position. Does the scan tool indicate that the switch is ON? |
Go to Step 4 | Go to Step 5 |
| 4 | Test for a short to ground in the rear fog lamp switch signal circuit. Did you find and correct the condition? |
Go to Step 12 | Go to Step 10 |
| 5 | Remove the rear fog lamp relay. Does the rear fog lamp turn OFF? |
Go to Step 6 | Go to Step 8 |
| 6 |
|
Go to Step 7 | Go to Step 11 |
| 7 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 12 | Go to Step 9 |
| 8 | Repair the short to voltage in the rear fog lamp supply voltage circuit. Refer to Wiring Repairs
. Did you complete the repair? |
Go to Step 12 | - |
| 9 | Replace the BCM. Refer to Control Module References
for replacement, setup and programming. Did you complete the replacement? |
Go to Step 12 | - |
| 10 | Replace the rear fog lamp switch. Refer to Headlamp Switch Replacement . Did you complete the repair? |
Go to Step 12 | - |
| 11 | Replace the rear fog lamp relay. Refer to Relay Replacement (Attached to Wire Harness)
or Relay Replacement (Within an Electrical Center)
. Did you complete the repair? |
Go to Step 12 | - |
| 12 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |