2004 Dodge Dakota Owner's Manual - Page 200

200 STARTING AND OPERATING of the trailer lights and assure their proper functioning, a heavy duty turn signal flasher can be installed as a separate equipment item by your dealer. Trailer Tow Wiring The Trailer Tow Package includes a wiring harness located at the rear underbody of the vehicle. NOTE: Connect trailer lighting and brakes using factory harnesses only. Do not cut or splice wiring to the brake circuits. The electrical connections are all complete to the vehicle but you must mate the harness to a trailer connector. Refer to the following table for wire color and function. Wire Color Black Blue Black/Orange Red/Tan Dk. Green/Red Brown/Red Violet/Black Function Ground Wire Trailer Brake Tail & Running Lamps Battery Lt. Stop & Turn Signal Rt. Stop & Turn Signal Backup Lamps WARNING! The direct connection of hydraulic brake lines from vehicle brake system to trailer system is not acceptable. The extra load may cause brake failure and you may be injured. Heavy trailer towing also may require breakaway electric trailer brakes, anti-sway devices or equalizing hitches for safe operation. Such devices are commonly required by state law. For all trailer tow or heavy-duty applications it is strongly recommended that the factory fill rear axle lubricant be replaced with an SAE 75W-140 synthetic gear lubricant. Mopar Synthetic Gear Lubricant is of this type.