Heated Glass Element: Description and Operation
Circuit DescriptionThe ETACM (Electric Time and Alarm Control Module)/TACM controls the operation of the rear window defogger and outside mirror defogger through defogger relay coil control.
When the defogger switch, in the A/C control module, is depressed (ON), the defogger relay coil is energized through the ETACM for 20 minutes. Battery voltage is supplied to the rear window defogger and the outside mirror defogger through the closed defogger relay contact.