Function of the Yellow Wire for 4- to 7-Way Adapter 30717 and Where Does it Install

Question:

I have a question about the Yellow wire on the # 30717. I have read that it is for Auxillary power. What do you connect it to and once connected, what gets the Auxillary Power? The TV is a Chevy Express Van and the Trailer is a Pop-Up. Thanks

asked by: Pat

Expert Reply:

The yellow wire on adapter # 30717 can be for auxiliary 12 volt power or for reverse lights. Auxiliary power is not something commonly used on pop-up trailers. Essentially, it is just another 12 volt circuit to power things that need 12 volt power on the trailer. But since there is already a 12 volt circuit you likely would not need it.

It would install the same way as the 12 volt circuit (black wire). You would run a length of wire, # 12-1-1, sold by the foot, from the yellow wire to the vehicle battery via a 40 amp circuit breaker # PK54540.

The other possible function is to use it for reverse lights and you would just tap into a reverse light wire behind one of the reverse lights. If the trailer does not have reverse lights (most do not) or if the trailer does not have a brake actuating coupler with electric reverse lockout then there is no need to use the wire and you can tape it up and stow it out of the way.

expert reply by: Michael H