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  1. J3 Slot in Fuse Box? What is it For?

    2011 Dodge Ram Forum
    Does anyone know what the J3 slot in the fuse box is intended for? There isn't a fuse in the slot on my truck, and it is labeled, "30A, RR Door Mod, Diesel PCM/T-Tow." I would like to use the terminal for a switched power source for my next project (train horns), and if I won't need it in the...
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