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Old 01-15-2018, 09:32 PM   #101
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Name: Jann
Trailer: Casita
Colorado
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Originally Posted by Raspy View Post
This is a very good plan. A common way to do it is with a Ford type, continuous duty relay, but I'm sure there are other good ones too.
We installed an isolator in our van a full size Chevy. The isolator was just a little silver canister about 3 inches tall and 1 1/2 to 2 inches across. It isolated the vehicle battery from the trailer battery so that they both charged but the vehicle battery couldn't be drained. We used a 30 amp fuse on it per the instructions that came with it. Very simple installation with the charge wire running to a 7 pin connector. The hot wire ran from a hot spot under the hood that was only hot when the engine ran. Full price was probably under $40 for isolator, fuse and wiring. We wired the entire 7 pin connector for charging, brakes and all lights. We used the color wires per the instructions. We put the brake controller in also. Really good instructions come with these things.
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Old 01-15-2018, 10:24 PM   #102
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Name: John
Trailer: Black Series HQ19
Smith Valley, Nevada
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Jann,

That sounds like a Ford style continuous duty relay. They are cheap, reliable and do the job very well. Only on when the TV ignition is on.
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