GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Interior Lights Schematics

Connector End View Reference: Lighting Systems Connector End Viewsor Data Communication Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

Turn ON the reading lamps.

Does the system operate normally?

Go to Testing for Electrical Intermittents

Go to Step 3

3

Test the inadvertent power supply voltage circuit of the reading lamp for a short to ground, high resistance or an open. Refer to Circuit Testing and Wiring Repairs.

Did you find and correct the condition?

Go to Step 8

Go to Step 4

4

Test the ground circuit of the reading lamp for high resistance or an open. Refer to Circuit Testing and Wiring Repairs.

Did you find and correct the condition?

Go to Step 8

Go to Step 5

5

Inspect the inoperative bulb for an open filament.

Is the bulb OK.

Go to Step 7

Go to Step 6

6

Replace the inoperative bulb. Refer to Dome Lamp Replacement.

Did you complete the replacement?

Go to Step 8

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7

Replace the dome lamp. Refer to Dome Lamp Replacement.

Did you complete the replacement?

Go to Step 6

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8

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3