Connecting 4-Way Vehicle Connector to 7-Way on Trailer Equipped with Battery But No Brakes

Question:

Connecting a 4 wire flat to a 7 wire trailer My trailer has no brakes. The extra wires are for charging the camper battery. What should I do with the blue wire?

asked by: Eugene D

Expert Reply:

If your trailer isn't equipped with electric brakes then the blue brake output wire can simply be capped off as its not needed.

Since you have a 4-Way flat connector on the tow vehicle you can use the Tow Ready # 30717. This will plug right into the existing 4-Way to provide a 7-Way at the other end to connect with the 7-Way on the trailer. Since the camper does have an auxiliary battery that needs to receive a maintenance charge you will have to run the black 12V wire coming from the adapter up to the Jeep's battery with additional 10 gauge wiring # 10-1-1 (sold by the foot) and a circuit breaker like # 9510.

The additional blue and yellow wires coming from the adapter can just be capped off and the white wire gets connected to a bare metal surface for ground.

expert reply by: Chris R