GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Heater Blower Controls System Check performed?

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Go to Step 2

Go to Heater Blower Controls System Check

2

  1. Move the blower motor speed selector switch to LOW.
  2. Backprobe the blower speed selector switch connector with a test lamp from cavity 4 to chassis ground.

Does the test lamp light?

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Go to Step 4

Go to Step 3

3

Replace the blower speed selector switch. Refer to Blower Switch Replacement .

Is the repair complete?

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Go to Heater Blower Controls System Check

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4

Backprobe the blower motor resistor connector with a test lamp from cavity 4 to chassis ground.

Does the test lamp light?

--

Go to Step 6

Go to Step 5

5

Repair the open in the PNK/BLK wire between the blower speed selector switch and the blower motor resistor. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Heater Blower Controls System Check

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6

Replace the blower motor resistor. Refer to Blower Motor Resistor Replacement .

Is the repair complete?

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Go to Heater Blower Controls System Check

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