Power Mirrors

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

The driver mirror motor left/down control circuit provides an input to the driver door module (DDM) when the LH mirror select switch is activated. This input allows the DDM to detect a mirror up switch, mirror down switch, mirror left switch or mirror right switch request from the driver door switch. The DDM provides both power and ground to the mirror switches. When the mirror up or down switch is activated, a ground is supplied through the mirror up or down switch to the DDM mirror up or down input which is pulled low. When the DDM detects low voltage on the left mirror switch up or down signal input, the DDM will command the mirror verticality. If the DDM detects low voltage on the left mirror switch left or right input, the DDM will command the mirror horizontally. If the RH mirror is selected, the DDM will send a message on the serial data line to the passenger door module (PDM) to operate the RH mirror in the direction selected by the RH mirror switch. The DCMs provide both power and ground for mirror output control through the vertical and horizontal mirror motor control circuits. The direction of the mirror motor is determined by the polarity of the voltage applied to the mirror motor.