GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Interior Lights Dimming System Check?

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Go to Step 2

Go to Interior Lights Dimming System Check

2

  1. Turn the headlamp switch to the OFF position.
  2. Remove the INST LPS fuse.

Did all of the instrument panel lamps turn off?

--

Go to Step 4

Go to Step 3

3

Locate and repair the short to battery positive voltage in CKT 8.

Did you complete the repair?

--

Go to Interior Lights Dimming System Check

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4

  1. Re-install the INST LPS fuse.
  2. Disconnect the panel dimmer switch connector.

Did the interior lamps turn off?

--

Go to Step 6

Go to Step 5

5

Repair the short to battery positive voltage in CKT 44 between the lamp dimmer module and the panel dimmer switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Interior Lights Dimming System Check

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6

Replace the panel dimmer switch.

Did you complete the repair?

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Go to Interior Lights Dimming System Check

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