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

Place the inoperative reading lamp in the ON position.

Does the reading lamp operate properly?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Does the courtesy lamp function of the inoperative reading lamp operate properly?

Go to Step 4

Go to Courtesy Lamps Inoperative

4

  1. Disconnect the inoperative reading switch.
  2. Using a test lamp connected to battery positive voltage, probe the ground circuit of the reading lamp switch.

Does the test lamp illuminate?

Go to Step 5

Go to Step 7

5

Test for a poor connection or an open in the reading lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 6

6

Inspect for poor connections at the harness connector of the reading lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 8

7

Repair an open or high resistance in the ground circuit of the reading lamp switches. Refer to Circuit Testing and to Wiring Repairs .

Did you correct the condition?

Go to Step 9

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8

Replace the inoperative reading lamp. Refer to Roof Side Rail Lamp Replacement .

Did you complete the replacement?

Go to Step 9

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9

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2