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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 954 (Lighting Systems) >> Diagnostic Information and Procedures >> Cargo Lamp Inoperative

Cargo Lamp Inoperative

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Cargo Lamp Inoperative

Step Action Yes No
Schematic Reference: Interior Lights Schematics 
Connector End View Reference: Lighting Systems Connector End Views  or Body Control System Connector End Views in Body Control System.
1 Did you perform the Lighting Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Lighting Systems 
2 Operate the cargo lamp to verify the fault is present.
Does the system operate normally?
Go to Testing for Electrical Intermittents in Wiring Systems Go to Step 3 
3
  1. Turn the cargo lamp switch to the ON position.
  2. Disconnect the cargo lamp.
  3. Connect a test lamp between the inadvertent power supply voltage circuit of the cargo lamp and a good ground.
Does the test lamp illuminate?
Go to Step 4  Go to Step 9 
4
  1. Ensure the cargo lamp switch is in the ON position.
  2. Connect a test lamp between the cargo lamp low control circuit of the cargo lamp and a battery positive voltage circuit.
Does the test lamp illuminate?
Go to Step 7  Go to Step 5 
5
  1. Disconnect the cargo lamp switch.
  2. Connect a fuse jumper wire between the cargo lamp low control circuit of the cargo lamp switch and the ground circuit of the cargo lamp switch.
  3. Connect a test lamp between the cargo lamp low control circuit of the cargo lamp and inadvertent power supply circuit of the cargo lamp.
Does the test lamp illuminate?
Go to Step 8  Go to Step 6 
6 Connect a test lamp between the ground circuit of the cargo lamp switch and a battery positive voltage circuit.
Does the test lamp illuminate?
Go to Step 10  Go to Step 11 
7 Inspect for poor connections at the harness connector of the bulbs. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 14  Go to Step 12 
8 Inspect for poor connections at the harness connector of the cargo lamp switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 14  Go to Step 13 
9 Repair the open in the inadvertent power supply voltage circuit. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 14  -
10 Repair the open in the cargo lamp low control circuit. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 14  -
11 Repair the open in the ground circuit of the cargo lamp switch. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 14  -
12 Replace the cargo lamp bulbs.
Did you complete the replacement?
Go to Step 14  -
13 Replace the cargo lamp switch. Refer to Lamp Switch Assembly Replacement - Front Fog Lamp and Cargo Lamp .
Did you complete the replacement?
Go to Step 14  -
14 Operate the system in order to verify the repair.
Did you correct the condition?
System OK Go to Step 3