GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Interior Lights Dimming Schematics

Connector Reference: Lighting Systems Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information in 2005 C/K Truck Service Manual

2

Connect a test lamp between cavity A of the voltmeter bulb and ground.

Does the test lamp illuminate?

Go to Step 3

Go to Step 4

3

Connect a self-powered test lamp to cavity B and ground.

Does the test lamp illuminate?

Go to Step 5

Go to Step 6

4

Locate and repair the open or high resistance in circuit 9.

Did you complete the repair?

Go to Step 7

___

5

Replace the voltmeter gage bulb. Refer to Voltmeter Gage Lamp Replacement .

Did you complete the replacement?

Go to Step 7

___

6

Locate and repair the open or high resistance in circuit 150.

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 2