GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the defogger system check?

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Go to Step 2

Go to Defogger System Check

2

  1. Turn the ignition switch to the ON position.
  2. Press the rear defogger switch to the ON position.
  3. Use a J 35616-200 in order to backprobe the instrument panel cluster assembly connector C3 from terminal 13 to ground.

Does the test lamp light?

--

Go to Step 3

Go to Step 5

3

Inspect for an open in BLK wire between the instrument panel cluster assembly and the junction block.

Is the assembly OK?

--

Go to Step 4

Go to Step 2

4

Repair/replace the instrument panel cluster printed circuit.

Is the repair complete?

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Go to Defogger System Check

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5

Repair an open in RED/WHT wire between S225 and the instrument panel cluster assembly.

Is the repair complete?

--

Go to Defogger System Check

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