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

2. This step checks for continuous operation of the auxiliary heater or A/C blower motor.
3. This step determines if the problems in the auxiliary heater or A/C blower motor switch.
4. This step tests for a short to voltage in the auxiliary heater or A/C blower motor supply circuit.

Fig 1: Auxiliary Blower Motor Always On (1 Of 2)
Courtesy of GENERAL MOTORS CORP.

Fig 2: Auxiliary Blower Motor Always On (2 Of 2)
Courtesy of GENERAL MOTORS CORP.