RAM 1500 Truck 4WD V8-4.7L (2008)
Trailer Lamps: Description and Operation
Operation
OPERATION
The standard 4-pin trailer tow connector contains the following vehicle circuits: park/tail lamps, left stop/turn lamp, right stop/turn lamp, and ground.
The optional trailer towing package 7-way connector contains the same circuits as the 4-pin connector plus the following additional circuits: backup
lamp, trailer battery and electric brake.
If an aftermarket electric brake controller is used, the electric brake pigtail harness supplied will make installation easier. The connection (blue 4-way
connector) for the harness is located under the instrument panel to the left of the brake pedal on top of the large body harness connection. Refer to the
appropriate wiring information.
The battery line of this harness may be used to charge the trailer battery. However, a battery isolation unit is not supplied and the trailer battery may
discharge the vehicle battery while the engine is not running. The battery line is protected by a fuse or a circuit breaker.
The trailer tow connectors as well as the hard wired inputs and outputs of the connectors may be diagnosed using conventional diagnostic tools and
procedures. Refer to the appropriate wiring information.
