The rear window defog relay is what keeps fog from building up on the rear window. It works by using current to warm the window to prevent moisture buildup that can hinder visibility.
Only thing I can come up with is the wires going up into the fuse block where the rear defrost relay (RR DEFOG label in the manual) are switched so when the relay is activated, which normally turns on both mirror heaters and the rear defog, is turning off the mirrors and turning on the rear defog. You need to unbolt the fuse block mount so you can lift it up and pull the RR Defog relay wires out the bottom and reverse the two circuit wires but not the two supply wires. Wish I could say right now what colors they are, but I don't have that. Odd situation...
FRONT SEATING AREA, PASSENGER SIDE, UNDER DASH, ABOVE KICK PANEL, MOUNTED IN RELAY BLOCK
The rear window defrost/defog heater grid.
never made them as far as I know.
located in back window with rear defog
where is the rear defogger relay located in a Toyota Camry
rear window defroster relay in a 97 Pontiac firebird
Chevrolet Tahoe rear blower relay switch can be found behind the dashboard. The relay switch will be behind the drivers side dashboard.
I'm sure there is a fuse somewhere, but the electrical connections for the rear defog are made thru the struts that hold the rear hatch open. this is why if you buy new struts for that car they will ask you does it have rear defog. the struts you need must have an electrical connecter at the forward end with a wire attached to each strut. go look.
The Rear Blower Motor Relay is located near the rear wiper amplifier, behind the rear LH quarter trim panel.NOTE: Ford does not provide a picture location of the Rear Blower Motor Relay. Ford only provides a written location and an image (see below) that shows the general area that the Relay is in. Full Body View
The 2005 Chrysler 300 rear window defrost relay switch can be found beneath the drivers side dashboard. The rear window defrost relay switch will be near the center console.
you cant get defog because you dont need defog in the game