License 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.
License 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 license lamps are inoperative. Do the license lamps operate normally? |
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Is the left tail lamp inoperative also? | Go to Step 5 | Go to Step 4 |
| 4 | Inspect the inoperative bulbs/sockets for open filaments or poor terminal contact. Does any lamp have an open filament or poor terminal contact? |
Go to Step 7 | Go to Step 6 |
| 5 | Repair the short to ground in the license lamp supply voltage circuit or left tail lamp tail 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 license 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 inoperative bulb or repair/replace the socket. Refer to Wiring Repairs
in Wiring Systems or License Lamp 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 |