is there a seperate/special loom?

yes. connects to the relay board ...
Andy

I pulled this one from a parts car.

Click to view attachment

Mark that looks extensive
Does it *plug* into the main harness or do you have to splice it onto?
what are the color codes or are the diff for diff model yrs?

let me repeat: "connects to the relay board"

on the relay board, there are two fuses towards the front of the car, the connector for the defroster harness in right in front of those, two prongs sticking out of the relay board.

- the wires for the defroster harness are yellow/red and green. yellow/red goes to the left prong, green to the right.

- you'll also need a relay in the relay socket that is the furthest towards the front of the board, also called the " Window Heater Relay".

- the fuse furthest towards the front of the board is for the rear window heater and should be a 8A fuse.


btw. all that info can be found in the haynes manual on page 147, 154 and 161, depending on the year of your car.

the wiring for the defroster harness is the same for all years.
Andy

Andy beat me to it.

Rich, let me know if you need any of that as I may still have part of it (at least the connector that plugs into the relay board and some of the wires).

If someone would be so kind as to extensively document the harness, I would very much appreciate it. Off the top of my head, I would love to see:

1. wire colors
2. wire lengths
3. connector pictures (various angles and measuring tape for size)

I would be happy to document it for free, maybe even build them if it can be sent to me.

Just installed one. Wires start at dash with the rear window defrost switch. The switch activates the relay in the engine compartment-as stated already. There is a special connector that plugs onto the two posts you see at the rear of your relay board; one 12v from the dash swtch, the other 12v to the window. That wire passes back into the car and connects to the rear window on the passenger side.