GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Interior Lights Schematics

Connector End View Reference: Master Electrical Component List

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Turn ON the LH roof rail reading lamp.
  2. Turn ON the RH roof rail reading lamp.

Do both reading lamps illuminate?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Repair the high resistance or an open in the inoperative roof rail reading lamp courtesy lamps supply voltage supply or ground circuit. Refer to Circuit Testing and Wiring Repairs .

Did you complete the repair?

Go to Step 4

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4

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3