2004 Dodge Ram 3500 Pickup Owner Manual Diesel - Page 277

STARTING AND OPERATING 277 CAUTION! Adding lights or electrical devices to the headlamp/ park lamp circuit can be accomplished by connecting to the standard 4-way trailer tow connector located behind the rear bumper. The maximum current capacity for the park lamp circuit should not exceed 15 amps total (a typical park lamp bulb can draw from 0.5 to 1.0 amperes of current). No connections can be made to the headlamp switch itself, because it is not designed for high current applications. Connections to the headlamp switch will cause the exterior lights to malfunction. CAUTION! Connect trailer lighting and brakes using factory harnesses only. Do not cut or splice wiring to the brake circuits. Use an approved wiring harness connector on the trailer. 5