Rear Defogger: Description and Operation

The rear window defogger system is controlled by the smart entrance control unit (Models with power door lock) or rear window defogger timer (Models without power door lock). The rear window defogger operates only for approximately 15 minutes.
Power is supplied at all times
^ to rear window defogger relay terminal (3)
^ through 15 A fuse (No. (9) ,located in the fuse block) and
^ to rear window defogger relay terminal (6)
^ through 15 A fuse (No. (10) , located in the fuse block).
With the ignition switch in the ON or START position, power is supplied
^ to the rear window defogger relay terminal (1) and
^ to smart entrance control unit terminal (11) (Models with power door lock), or
^ to the rear window defogger timer terminal (1) (Models without power door lock).
Ground is supplied to terminal (2) of the rear window defogger switch through body ground (M57).
When the rear window defogger switch is activated, ground is supplied
^ through terminal (1) of the rear window defogger switch
^ to smart entrance control unit terminal (20) (Models with power door lock) or
^ to rear window defogger timer terminal (3) (Models without power door lock).
Terminal (36) of the smart entrance control unit (Models with power door lock) or terminal (2) of the rear window defogger timer (Models without power door lock) then supplies ground to the rear window defogger relay terminal (2).
With power and ground supplied, the rear window defogger relay is energized.
Power is supplied
^ through terminals (5) and (7) of the rear window defogger relay
^ to condenser terminal (1)
^ through terminal (2) of the condenser
^ to the rear window defogger.
The rear window defogger has an independent ground.
With power and ground supplied, the rear window defogger filaments heat and defog the rear window. When the system is activated, the rear window defogger indicator illuminates in the rear window defogger switch.
Power is supplied
^ to terminal (3) of the rear window defogger switch
^ from terminal (5) of the rear window defogger relay.
Terminal (4) of the rear window defogger switch is grounded through body ground (M57).