Originally Posted by moejean
Thanks Paz for clarifying that for Easyrider. The three wires that are needed from the engine compartment to the cabin are: two for a dedicated 12v source directly from the battery for the Rvi brake and one for the break-away wire. I have a charge circuit from the MH to the Equinox to keep the Equinox batteries charged. I am using a 6-pin plug, four for the lights and two for the charge circuit. I bought the charge system on line and it works like a charm
Our Equinox battery has never gone dead in a year of towing. IMO, a charge line is not necessary.
Because the only 12V plug in the vehicle that stays hot when the key is off is all the way in the back, I installed a new 12V socket that stays hot all the time right by the fuse panel. In the fuse panel, there are several unused sockets. I used a test light to find one that was hot all the time and to find out which was the hot side. I used a spade connector to pick up only the hot side and ran a wire with a 12V, 15A inline fuse
to the new 12V socket. The inline fuse is out of view behind the panel. The new socket is grounded to a metal support behind the kick panel. Because the new socket stays hot all the time, it is also more useful when we're not towing for things like charging the phone, etc.
BTW, I installed a switch on our old Saturn because the fuse that had to be pulled was under the hood. It was also a huge 30A thing that was very tight in the socket. The one on the Equinox is so easy to reach since it's in the passenger compartment and so easy to pull since it's one of the mini fuses, I didn't bother with a switch. I just wrapped a small wire tie around the body of the fuse to make it easy to get a hold of it.