Tail 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.
Tail 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 tail lamps are inoperative. Do the tail lamps operate normally? |
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Inspect the appropriate fuse for the inoperative lamps in the body relay block. Is the fuse open? |
Go to Step 5 | Go to Step 4 |
| 4 | Test the inoperative bulb or tail lamp printed circuit board for an open or poor terminal contact. Refer to Circuit Testing
in Wiring Systems. Did you find a condition? |
Go to Step 7 | Go to Step 6 |
| 5 | Repair the short to ground in the inoperative tail lamps supply voltage circuit or license lamp supply voltage circuit. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 8 | - |
| 6 | Repair the open or high resistance in the inoperative tail lamps supply voltage circuit or ground circuit. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 8 | - |
| 7 | Replace the defective bulb or tail lamp printed circuit board. Refer to Tail Lamp Bulb Replacement or Tail Lamp Circuit Board Replacement . Did you complete the repair? |
Go to Step 8 | - |
| 8 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |