To find this out you will need to either consult your owners manual or simply look around the dash and the steering column on the drivers side of your Mirada for a loose wiring harness. The Prodigy P3 # 90195 brake controller is one of our most popular choices and is an excellent choice. If you have the wiring harness on the vehicle end, then all you have to do is use an adapter, part # 3035-P, to connect the Prodigy P3 to your wiring harness. If you don't have the wiring then you will... view full answer...