GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the HVAC Blower Controls System Check performed?

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Go to Step 2

Go to HVAC Blower Controls System Check

2

  1. Disconnect the connector at the auxiliary blower motor resistor.
  2. Disconnect the connector at the auxiliary blower motor.
  3. Connect a J 39200 between the auxiliary blower motor resistor connector, cavity D, and the auxiliary blower motor connector, cavity B, in CKT 1172 (YEL).

Is continuity present?

--

Go to Step 3

Go to Step 4

3

Replace the auxiliary blower motor resistor.

Refer to Auxiliary Blower Motor Resistor Replacement .

Is the repair complete?

--

Go to HVAC Blower Controls System Check

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4

Repair the open in CKT 1172 (YEL) between the auxiliary blower motor resistor connector and splice S413.

Refer to Wiring Repairs .

Is the repair complete?

--

Go to HVAC Blower Controls System Check

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