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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1322 (Lighting Systems) >> Diagnostic Information and Procedures >> License Lamps Inoperative

License Lamps Inoperative

WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
License Lamps Inoperative

Step Action Yes No
Schematic Reference: Exterior Lights Schematics 
1 Did you review the Lighting System Description and Operation and perform the necessary inspections? Go to Step 2  Go to Symptoms - Lighting Systems 
2 Verify that the license lamps are inoperative.
Does the system operate normally?
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3 Using a test lamp, check cavity 2 of the license plate lamps to ground.
Does the test lamp illuminate?
Go to Step 4  Go to Step 5 
4 Test the license plate lamps cavity 1 for continuity to ground.
Is a ground present?
Go to Step 6  Go to Step 7 
5 Repair the open in the license lamp supply voltage circuit between C2 cavity 7 of SP300 and cavity 2 of the license plate lamps. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
Go to Step 8  -
6 Replace the license plate lamp socket. Refer to License Lamp Replacement .
Is the replacement complete?
Go to Step 8  -
7 Repair the open in the ground circuit between cavity 1 of the license plate lamps and G300. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
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