1994 GMC Jimmy Owner's Manual - Page 134

Trailer WiringHarness Your vehicle may have either 5-wire or 7-wire harness. a The light duty trailer wiring is 5-wire harness assembly taped and bundled a at the left corner of the vehicle interior, next to the endgate. harness has The no connector, and you should havea qualified service person wire your so of harness for you. It must be routed out your vehicle and attached that the trailer or the body won't pull it. The heavy duty trailer wiring is 7-wire harness assembly consisting a a of 5-wire harness and a 2-wire harness taped together and stored under the a vehicle, along the rearframe crossmember. It has 30-amp feed wire with an inlinefuse located by the junction block. "Fuses and Circuit See Breakers" in the Index. Both the 5-wire harness and the 2-wire harness have no connector and should be wired a qualified service person. Attach the harness to the by it frame rail. Be sure you leave it trailer, then tape or strap to your vehicle's loose enough so the wiring doesn't bend or break, but so loose thatit not drags on the ground. Store the harness inits original place. Wrap the harness together and it tie neatly so it won't be damaged. 2-80