One of the things I discovered just the other day, while installing a thermostat for an additional A/C unit in the garage area of my toy hauler. I had tried to remove the HappiJack wall switch to get a peek inside the wall at that area to try and find my pre-wired thermostat wiring for the A/C. When I tried to take out the HJ switch, it seemed to be hung up on something and didn't want to come out of the wall. I removed a double switch that is right below it and saw that the HJ doesn't have "traditional" type wires attached to it.....like 14ga or 12ga or ??? ga wires. There is a switch unit, a printed circuit board, and a telephone type connector (RJ11) that is plugged into the P.C. board. That is possibly one place you could check....to make sure that the plug has not come loose from the P.C. board and then on the other end, up by the motor for the HJ.....make sure all connectors are secure. If I'm not mistaken, they use the same type plugs (RJ11) for the limit switches to stop the bed on it's upward travel and on the down stroke. Check them. If a down limit connection is loose or not making contact, the bed will not come down.....and vice versa
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2016 F350 King Ranch Crew Cab Dually Diesel 4x4
2018 Grand Design Momentum 394M
2023 Suzuki GSX-S1000GT+
Excessive payload capacity is a wonderful thing
"If it ain't Fast....It ain't Fun"
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