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 reading lamps in the ON position.

Do all the reading lamps illuminate?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Are all reading lamps and vanity mirror lamps inoperative?

Go to Step 4

Go to Step 7

4

Is the INT/LAMP fuse in the instrument panel (I/P) fuse block open?

Go to Step 5

Go to Step 6

5

Test the following circuits for a short to ground:

    • Battery positive voltage from the INT/LAMP fuse
    • Courtesy lamp high control
    • Inadvertent power courtesy lamp

Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the concern?

Go to Step 14

Go to Step 10

6

Test the inadvertent power courtesy lamp and battery positive voltage (from the INT/LAMP fuse) circuits for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the concern?

Go to Step 14

Go to Step 10

7

Test the inadvertent power courtesy lamp and ground circuits of the inoperative lamp for a high resistance or an open.

Did you find and correct the condition?

Go to Step 14

Go to Step 8

8

Test the bulb filament for an open.

Is the bulb OK?

Go to Step 9

Go to Step 11

9

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 14

Go to Step 12

10

Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 14

Go to Step 13

11

Replace the bulb. Refer to Overhead Console Reading Lamp and Bulb Replacement .

Did you complete the replacement?

Go to Step 14

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12

Replace the inoperative reading lamp assembly. Refer to the following:

    •  Dome Lamp Replacement

Did you complete the replacement?

Go to Step 14

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13

Replace the BCM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 14

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14

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2