Alright guys i have an 88 GTU i have a flip down license plate and i wanted to use the power off the rear wiper switch to activate it.. Now the car never came with a rear wiper but the switch is there and i would like to use the switch but have no idea where the plug is that carries the power or if the harnesses are different any ideas?
Thanks
TwEaK

 

EDIT:
Blue/Green wire, which has voltage with key to on, found in "CR-01" which is same plug connected to front wipers.

 

dammit satch! you wiring guru you!

TwEaK

 

one last question the wire wouldnt already be at the back of the car?

 

Lets say you "did" have the complete rear wiper setup. If that were the case, the switch would receive power via the Blue/Green wire. In the rear of the car there would be two motors, one for the wiper itself and the other for the washer fluid motor. The way that system works is the switch would send a ground to the motors in the rear to activate the motors for both motors would already have voltage via the Light Green/Yellow wire with the key to "on," but they would be missing the ground wire source to activate them and when you either turned the rear wiper motor to turn the rear wiper on or pressed the button to shoot the washer fluid onto the rear windshield it would then send a ground on the other wire connected to the respective motors thus completing the circuit and therefor the motor(s) would turn on and do their thing.

Thus you would have to figure out whether you want to activate your system by putting a ground to it or to activate it by putting voltage to the motor. As indicated above, the rear wiper system works by putting a ground to the motor(s) to engage them but you may not want to do it that way.