Originally Posted by Pooneil
I am unsure of the rationale for removing one wire vs another when in storage. Both wires of course need to be in place when under tow for the breakaway switch to activate the brakes. A cut off switch in use under tow must be on the positive wire with a bypass so the breakaway switch is always connected to the battery.
I think the rationale, is because of the spark that is created if you only remove the positive side. The OP was talking about storage and his battery always running low from parasites. But some are wired directly to the positive side. I truly think the best way is to locate the parasites and installing a switch to shut them off so they can't draw any power. It's the easy way out. When you hook -up of course you are going to want your battery working, one for just the trickle charge that will come through your 7 pin plug from your TV. You just have to remember to turn your switches on for all the parasites. Depending how they wired it, and each trailer is different. Even FR will tell you that. That is why they can't supply a diagram for it. It took me a couple of hrs. to trace all my wiring. Even my panel was listed wrong from what I found, but now I know for sure....It's easy to install a toggle switch at each one you just break the hot wire and put it between, then you know it's off and can't draw your battery down.....