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. In accordance with aux to usb wiring diagram you will find just four wires used from the cable.

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Aux wiring diagram. 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. Just grab a spare wire from somewhere to use as the third. Black cable serves as ground exactly like in every other apparatus. On with the ignition. On all the time. You can choose the length you need for your vehicle.
The universal harness kit with mouse style switch can be assembled with a dc24v relay. 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. The red one is to get sure wire with dc ability of 5 volts. Also it must connect with things if included that use the aux power and back up lights too. Auxbeam light wirings can wire off road driving lights fog lights work lights etc.
The trailer wiring diagram shows this wire going to all the lights and brakes. Speaker wire usually has 2 insulated wires bonded together so youll need a third for the ground. I used 18 gauge wire and get excellent signal. We have 2m and 25m of wiring. Connect all the wire to the aux ends solder shrink tube it braid it then do the same to the other end. Typically it uses black green white and red cable colors.
Asw h12b4e series air conditioner pdf manual download. Depending on how the solenoid is wired it can be switched to be.