GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Important: Check for inoperative bulb before beginning diagnostic procedure.

1

Did you perform the Lighting Diagnostic System Check?

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Go to Step 2

Diagnostic System Check - Lighting Systems

2

  1. Activate high beam headlamps with column switch (high beam indicator in cluster should illuminate)
  2. Disconnect steering column connector C201
  3. On the steering column harness side, check for continuity between cavities E11 and E13.

Is continuity present?

--

Go to Step 6

Go to Step 3

3

Check for continuity in CKT 1200 (LT GRN) in the steering column harness between cavity E11 and the steering column multi-function switch.

Is continuity present?

--

Go to Step 5

Go to Step 4

4

Repair the OPEN in CKT 1200 (LT GRN) in the steering column harness between cavity E11 and the steering column multi-function switch.

Is the repair complete?

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Go to Step 7

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5

Replace the multi-function switch in the steering column Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle

Is the repair complete?

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Go to Step 7

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6

Locate and repair OPEN in CKT 1200 (PNK) between splice S254 and cavity E11 at C201.

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