The trailer wiring diagram shows this wire going to all the lights and brakes. Depending on how the solenoid is wired it can be switched to be.

Quad Led Fog Driving Light Kit For 2010 2014 Ford F 150 Raptor 4 10w Cree Led Pod Lamps Lower Bumper Mounting Brackets Amp Wiring Switch
Aux wiring diagram. View and download aux asw h12b4e series service manual online. Asw 12b4e series asw 12a4e series asw h09a4e series asw 09a4e series asw h12a4e series. You can choose the length you need for your vehicle. Just grab a spare wire from somewhere to use as the third. We have 2m and 25m of wiring. On all the time.
Speaker wire usually has 2 insulated wires bonded together so youll need a third for the ground. The red one is to get sure wire with dc ability of 5 volts. I used 18 gauge wire and get excellent signal. In accordance with aux to usb wiring diagram you will find just four wires used from the cable. Black cable serves as ground exactly like in every other apparatus. Connect all the wire to the aux ends solder shrink tube it braid it then do the same to the other end.
Also it must connect with things if included that use the aux power and back up lights too. The universal harness kit with mouse style switch can be assembled with a dc24v relay. On with the ignition. Auxbeam light wirings can wire off road driving lights fog lights work lights etc. Asw h12b4e series air conditioner pdf manual download. The solenoid isolator uses a continuous duty solenoid to connect the auxiliary battery during certain times like starting and charging then disconnects when not in use.
Some trailer builders just connect this wire to the frame then connect the ground from all the other lights and accessories to the frame as well. Typically it uses black green white and red cable colors.