E53 Style Window Switches
The E53 power window switch design is a push - pull type switch. Each switch provides the GM with the coded ground signaling strategy as previous two wire switches.
Pushing a switch to the first detent and holding provides a single ground signal on one wire requesting the GM to operate the window motor in the down direction.
When released, the ground signal is removed and the window motor stops.
Momentarily pushing the switch to the second detent and releasing provides an additional ground signal on the second wire requesting the "one touch mode", operating the window motor automatically.
The motor runs the window down until it reaches the end stop.
The switch functions in the same manner for the upward run of the window motor but the ground signal sequencing is reversed.