If the wires to the magnet get hot and short out before your battery dies, you won't have any brakes on the trailer. Personally, I would not do it and take the chance. Chock the wheels well, and drop the stabilizer jacks. It doesn't sound like leaving it hooked up to your TV isn't an option.
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Think you're too old to cry or swear out loud...walk into your hitch in the dark.
2012 Jay Flight 19RD
2016 Ford F150 XLT 2X4 SC 3.5L Eco Max Tow
2010 Tundra TRD DBL Cab (Traded)
2 new fluffy Corgis, Bayley and Stanley
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