Test Description

WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.

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

2. This step tests for auxiliary heater and A/C blower motor operation in any speed setting.
3. This step identifies the presence of battery positive voltage at the auxiliary heater and A/C blower motor switches.
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.