GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Important: Check for inoperative lamp/bulb before beginning diagnostic procedure.

1

Did you perform the Lighting Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Connect a test lamp from CKT 1732 (ORN) to the inoperative reading lamp to ground.

Does the test lamp light?

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Go to Step 3

Go to Step 5

3

Inspect for an open in CKT 1350 (BLK) to ground G400.

Did you find an open?

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Go to Step 4

Go to Step 6

4

Repair the open in CKT 1350 (BLK) to ground G400.

Is the repair complete?

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Go to Step 7

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5

Repair the open in CKT 1732 (ORN) from the reading lamp to splice S301.

Is the repair complete?

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Go to Step 7

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6

Replace the reading lamp bulb Dome and Reading Lamp Bulb Replacement .

Is the repair complete?

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Go to Step 7

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7

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2