On the 93 even if you have the tow package, the 7pin receptacle is not mounted. The brake and battery wires are wrapped up in the frame in a harness. Dig them out, one will be blue and the other is black or orange. The Hopkins adapter plugs in for the tail/brake and running lights. You have to hook up all them wires to a 7-pin receptacle. Wiring diagrams are on etrailer. If you don't have the pigtail to hook up a brake controller I have one. $10 + ship. That brake pigtail is usually in the glove box on a new truck.