Those 7 pole RV Plugs n Connectors have a terminal labeled AUX that can be used to keep the trailer battery charged via the tow vehicles alternator while driving. Id use a 20 or 30 amp circuit breaker, depending upon wire sizes (Id likely run 10 gauge to the rear and use a 30 amp breaker), to protect that feed wire fuzed close to the tow vehicles battery, of course. When you disconenct the trailers plug youre disconencted from the tow vehicle (and its battery) of course which should suffice but if you want additional protection for the trailer battery you can install a disconenct right at its + terminal. You can disconenct the trailer plug from the truck when using the wench to prevent discharging the truck battery and/or plug back in n let the truck run to recharge the trailer battery, teh 30 amp breaker will provide some protection.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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