How to Connect the Yellow Wire for Use on Adapter Vehicle End Trailer Connector # 30717

Question:

so if i want to use it what do i hook it up to and how does it have to be fuesed or switched or directly hooked to the battery thanks. yellow wire

asked by: Corey R

Expert Reply:

Regarding the Yellow wire on the Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector, # 30717, how and what you connect it depends on what function you need it to perform. For example if your trailer has reverse lights, or you have a coupler with an electric reverse lockout feature, you would connect the yellow wire to the reverse light wire behind one of the taillights.

If you need it to provide power to something on the trailer such as to maintain a battery, you should have it attached directly to the battery via a 40 amp circuit breaker, # PK54540. If you do not need it it does not need to be connected to anything. Just tape it up and stow it out of the way so it is ready when you do need it. I have included a link to a video showing a typical installation for reference.

expert reply by: Michael H