It should be on top of the driver`s side rear plastic fender well. Take the three screws out of the rear body (good luck) then lift the body up and you will see it. (follow the wire harness).
I don`t remember if it is the old style or solidstate. should have three wires going to the plug for it. red/white, green, and black.
You will see the back up buzzer and fuses too I think. Sorry but it has been a while since I had to work on one of these.