Marker Lamps Inoperative
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Marker Lamps Inoperative Diagnostic Test
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views |
|||
| 1 | Did you perform the Lighting Systems Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 | Verify that the marker lamps are inoperative. Do the marker lamps operate normally? |
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Place the headlamp switch in the PARK position. Do the park lamps operate normally? |
Go to Step 4 | Go to Symptoms - Lighting Systems |
| 4 | Inspect the inoperative bulb and socket for an open filament or poor terminal connections. Does any lamp have an open filament or poor terminal connections? |
Go to Step 6 | Go to Step 5 |
| 5 | Repair the open or high resistance in one of the following circuits. Refer to Wiring Repairs
in Wiring Systems:
Did you complete the repair? |
Go to Step 7 | - |
| 6 | Replace the defective bulb or repair/replace the socket. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 7 | - |
| 7 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |