I have a 94 formula with a trans am hatch and was wondering how to hook up the rear defroster. It did not have one on the stock hatch.
When I put the trans am hatch on it had 1 or 2 extra wires for the defroster, not sure though.
I bought a defroster switch from a camaro and it has 5 wires going into it. The colors are brown, black, orange, purple, and gray.
I looked at the wiring diagrams in my chilton manual but couldn't find the rear defroster.
Can anyone tell me how to hook this up, or point me to a wiring diagram?

If the wires were there in the rear for the defroster, I would imagine they are in the dash as well. If that is the case pick up a set of heater controls from a car that had defrost. The switch is built into the controls.

There are 2 extra wires coming from my new hatch, but there aren't any extra wires in my car to splice them into.
I can run some wire from my hatch to my new switch, but I need to know what the other three wires are for.
There are five wires on the switch and only 2 come from the rear hatch defroster.
I imagine one of the three extra wires is a ground, and another is for the light on the switch, but I'm not positive.

Here is a picture of the switch I have:


Thanks.