1993 GMC Jimmy Owner's Manual - Page 146

Featums & Controls 'tLaSler Wring Harness Yourvehiclemayhaveeither a 5-wire or 7-wire harness. The light duty trailer wiring is a 5-wire harness assembly taped and bundled at the left corner of thevehicleinterior,nexttotheendgate.Theharnesshas noconnector,andyoushouldhave a qualified service person wire your harnessforyou. It must be routed out of your vehicle and attached so that the trailer or the body won't pull it. KO249 The heavy duty trailer wiring includes both a 5-wire harness assembly (the light duty trailer wiring) and a 2-wire harness assembly. The 2-wire harness is stored under the vehicle along the rear crossmember. Both the 5-wire harness be wired by a qualified and the %wire harness have no connector and should service person. Attach the harness to the trailer, then tape or strap it to your" vehicle's frame rail. Be sure you leave it loose enough so the wiring doesn't bend orbreak,butnot so loose that it drags on the ground. Store the harness in its original place. Wrap the harness together and neatly so it won'tbedamaged. tie it 2-86