I have an original 87 iroc, 5.7 tpi motor, my question is the following.

Behind my passenger side kick panel there is a 4 wire connector ( red, black, light green, dark green wire colours) inside the inner metal on the car. I was wondering what relay is supposed to be plugged into this connector and what does this relay control? i just picked up the car and the local dealer isnt being much help.

Anyone have any ideas?