Diagnostic Aids

WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

The automatic Day/Night feature of the mirrors may not operate properly or become inoperative due to the following:

An intermittent short to ground or battery positive voltage in the signal circuit of the driver outside rearview mirror element (w/DR2).
An intermittent short to battery positive voltage in the backup lamp supply voltage circuit.

Fig 1: Mirrors - Automatic Day/Night Inoperative Diagnostic Table (Steps 1-8)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Mirrors - Automatic Day/Night Inoperative Diagnostic Table (Steps 9-16)

Courtesy of GENERAL MOTORS CORP.