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 - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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