Power Windows - Tailgate: Description

General Motors uses only one type of power tailgate window on "B" body station wagons for 1975. Tailgate window is retractable into space between roof and headliner. It can be operated by either the instrument panel switch or external tailgate window control switch. An ignition relay prevents window operation from instrument panel switch until ignition switch is turned on. The window is controlled by a gearbox type regulator, 12 volt reversible motor with an internal circuit breaker, guide cams and rollers, drive cable and lift spring. Motor & regulator assemblies are mounted to the rear of spare tire well in right quarter area. During window movement, the motor drives a cable operating the window regulator gear. In turn, the regulator gear pulls through it a spiral cable connected to window guide cam. The spiral window cable is stored in conduit below regulator. Upward travel of window is assisted by a lift spring mounted in roof above headliner.