Tailgate Window Defogger: Operation

Actuating the defogger control switch on instrument panel (with engine running because of high current draw) causes defogger relay contacts to close. A timer, enclosed in relay case, will allow the defogger to operate for about 8 to 12 minutes, depending upon the ambient temperature. If the control switch or ignition switch is turned off then the system will be deactuated. A pilot lamp on the instrument panel indicates the system is in operation.