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    trailer battery not charging

    Hello all, first post here. I have a 2011 Ford f150 with the tow package. I am not getting 12 v at my 7 pin plug so the trailer battery is not charging. I have installed the relay and 30 amp fuse required in the power box under the hood, but still no 12v at the 7 pin. Is there another fuse I am...
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