Fog Lamps Inoperative
WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
Fog Lamps Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Fog Lights Schematics Connector End View Reference: Power and Grounding Connector End Views in Wiring Systems. |
|||
| 1 | Did you perform the Lighting System Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 |
|
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Is only one fog lamp inoperative? | Go to Step 4 | Go to Step 6 |
| 4 |
|
Go to Step 5 | Go to Step 22 |
| 5 | Using a test lamp, probe between the ground circuit and supply voltage circuit of the inoperative fog lamp. Does the test lamp illuminate? |
Go to Step 18 | Go to Step 24 |
| 6 |
|
Go to Step 7 | Go to Headlamps Inoperative - High Beams |
| 7 | Check the FOG LP fuse for an open. Is the FOG LP fuse open? |
Go to Step 16 | Go to Step 8 |
| 8 |
|
Go to Step 9 | Go to Step 20 |
| 9 |
|
Go to Step 10 | Go to Step 20 |
| 10 |
|
Go to Step 12 | Go to Step 11 |
| 11 |
|
Go to Step 17 | Go to Step 14 |
| 12 | Connect a fused jumper between the switch side supply of the fog lamp relay and the fog lamps supply voltage circuit of the fog lamp relay. Do the fog lamps illuminate? |
Go to Step 19 | Go to Step 16 |
| 13 | Connect a fused jumper between the fog lamp switch signal circuit and ground. Do the fog lamps illuminate? |
Go to Step 23 | Go to Step 14 |
| 14 | Test for an open high resistance short to battery positive voltage or a short to ground in the fog lamps switch signal circuit of the fog lamp switch. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 30 | Go to Step 15 |
| 15 | Test for an open, high resistance, or short to battery positive voltage in the control circuit of the fog lamp relay. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 30 | Go to Step 21 |
| 16 | Test for a short to ground in the fog lamp supply voltage circuit. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 30 | Go to Step 20 |
| 17 | Inspect for poor connections at the harness connector of the fog lamp switch. Refer to Testing for Intermittent Conditions and Poor Connections
and to Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 30 | Go to Step 26 |
| 18 | Inspect for poor connections at the harness connector of the inoperative fog lamp. Refer to Testing for Intermittent Conditions and Poor Connections
and to Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 30 | Go to Step 25 |
| 19 | Inspect for poor connections at the harness connector of the fog lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections
and to Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 30 | Go to Step 27 |
| 20 | Inspect for poor connections at the harness connector of the fuse block - underhood. Refer to Testing for Intermittent Conditions and Poor Connections
and to Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 30 | Go to Step 28 |
| 21 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections
and to Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 30 | Go to Step 29 |
| 22 | Repair an open or high resistance in the fog lamp supply voltage circuit of the inoperative fog lamp. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Has the repair been made? |
Go to Step 30 | - |
| 23 | Repair a poor connection or an open in the ground circuit of the fog lamp switch. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Has the repair been made? |
Go to Step 30 | - |
| 24 | Repair an open or high resistance in the ground circuit of the inoperative fog lamp. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Has the repair been made? |
Go to Step 30 | - |
| 25 | Replace the inoperative fog lamp. Refer to Fog Lamp Replacement - Front . Has the repair been made? |
Go to Step 30 | - |
| 26 | Replace the multifunction turn signal switch. Refer to Multifunction, Turn Signal Switch Replacement
in Steering Wheel and Column. Has the repair been made? |
Go to Step 30 | - |
| 27 | Replace the fog lamp relay. Refer to Relay Replacement (Within an Electrical Center)
or Relay Replacement (Attached to Wire Harness)
in Wiring Systems. Has the repair been made? |
Go to Step 30 | - |
| 28 | Replace the fuse block - underhood. Refer to Underhood Electrical Center or Junction Block Replacement
in Wiring Systems. Has the repair been made? |
Go to Step 30 | - |
| 29 |
IMPORTANT:
Perform the set up procedures for the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration
in Body Control System. Replace the BCM. Refer to Body Control Module Replacement
in Body Control System.Has the repair been made? |
Go to Step 30 | - |
| 30 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |