GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Was the HVAC System Check performed?

Go to Step 2

Go to HVAC System Check

2

  1. Turn the ignition switch to the ON position.
  2. Move the blower speed selector switch to the HIGH position.
  3. Backprobe the connector of the blower speed selector switch with a test light from terminal 3 to ground.

Does the test lamp light?

Go to Step 3

Go to Step 4

3

Repair the open in the PNK wire between the blower speed selector switch and S232. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

Go to HVAC System Check

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4

Replace the blower speed selector switch. Refer to Control Assembly Replacement .

Is the repair complete?

Go to HVAC System Check

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