GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Were you sent here from the Interior Lights Dimming System Check?

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Go to Step 2

Go to Interior Lights Dimming System Check

2

Inspect the WHT/GRN wire between the IP lamp controller and junction block 3 C3 cavity 17 for a poor connection.

Is there a poor connection?

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Go to Step 3

Go to Step 5

3

Repair the poor connection on the WHT/GRN wire between the IP lamp controller and junction block 3 C3 cavity 17. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Interior Lights Dimming System Check

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4

Replace the IP lamp controller. Refer to Instrument Panel Lamp Dimmer Switch Replacement in Instrument Panel, Gauges and Console.

Is the repair complete?

--

Go to Interior Lights Dimming System Check

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5

Inspect the junction block 3 for any lose contacts or poor connections.

Is there any lose contacts or poor connections?

--

Go to Step 6

Go to Step 4

6

Repair the poor or loose connection on the junction block 3. Refer to Connector Repairs in Wiring System.

Is the repair complete?

--

Go to Interior Lights Dimming System Check

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