Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. 2. This step tests for auxiliary heater and A/C blower motor operation in any speed setting.
2. 3. This step identifies the presence of battery positive voltage at the auxiliary heater and A/C blower motor switches.
3. 6. This step tests for a possible open in the A/C relay ground circuit.
   Fig 1: Auxiliary Blower Motor Inoperative (1 Of 3)

   Courtesy of GENERAL MOTORS CORP.
   Fig 2: Auxiliary Blower Motor Inoperative (2 Of 3)

   Courtesy of GENERAL MOTORS CORP.
   Fig 3: Auxiliary Blower Motor Inoperative (3 Of 3)

   Courtesy of GENERAL MOTORS CORP.