Struggling Atwood jacks

Are the safety clutches popping? You'd know if they are, loud POP POP POP from any given jack head. That would tell you they're actually overloaded. Otherwise, as most others have suggested, either bad wiring or you need the extra *oomph* of being plugged in, or both.

I had HappiJac's, and had to get rid of them because they couldn't handle my camper, but admittedly, mine's just a little heavier than yours.

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