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Old 03-31-2013, 07:41 AM   #1
LouSlugger
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electric bunk problem -- ideas welcome

Motor for my twin electric bunks stopped working for no apparent reason. Happijac system. Happijac tech support has be exceptionally helpful and responsive. Anyway, through series of trouble shooting tests (and replacing the switch and the control board), the problem is somewhere between batteries and control board. All fuses are good, including the 15 amp in-line fuse in the battery compartment. No problems with anything else in rig.
I'm waiting to hear back from Happijac for suggested next step but thought I would float situation to forum in case anyone has any ideas of what the problem might be.
I could always run pigtails from control board to a spare battery to operate motor until the problem is solved, and there is also the option of manual operation, but want to figure this out. Thanks in advance.
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Old 03-31-2013, 08:26 AM   #2
saltytuna1
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Could there be a second fuse in the fuse panel for the Happyjak?

Steve
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Old 03-31-2013, 10:46 AM   #3
Big Boy w/ Big Toys
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You are going to need to follow the wires and see if you have a break or a bad connection. Test at every junction/splice for power till you find the problem.

When you checked the fuses did you actually pull them and test with a meter. Also look for any corrosion at all connections.

I do trailer repair from time to time for friends and electrical problems most folks will defer to a shop because they seem so complicated. In actuallity they are very easy. Start at your power source and work back. The other thing to do "IS CHECK THE GROUNDS"!!!!! Get a good Mutlitmeter and get to work, You already have changed out some of the problem items so finding your missing power should be easy.
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Old 03-31-2013, 11:56 AM   #4
KenBob
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From the wiring diagram from HJ, it looks like there should be 12 volt power and a ground to the circuit board. I would think if there is no 12v+ at the board, then there is an open in that circuit. Checking ground to the board should be easy as well. If you have both, then a switch, motor, or board is next to test. The other thread on this same problem indicated the motor failed. Maybe some more info on the diagnosis procedures done may allow us to assist better. The diagram ( http://www.happijac.com/images/pdfs/...iringdiagm.pdf ) shows the circuit board's power and ground coming from the 12v batt+ lug at the convertor. If this is correct, have you checked any and all connections at the convertor?

Other than a fuse, I would hope there are no other splices in the circuit. Also the feed wires to the circuit board should be 10g. A relatively large wire and should be easy to trace.
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Old 03-31-2013, 12:28 PM   #5
SteveC7010
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Another issue to consider. We've seen numerous reports here of poor crimps on the terminals on the wiring. So while you are tracing the suspect wiring, at some point, disconnect the battery and then systematically check each terminal. One connection at a time, remove it and inspect the terminal. It should not be loose on the wire! Make sure the wire is all the way through the crimp section and visible (see below.) Then re-crimp it if you have or can borrow a crimping tool. Reconnect and move to the next terminal.

This is a properly crimped terminal. The arrow points to the tip of the wire which should be just visible where you see it. The wire is firmly held by the crimp in two places; one on the bare conductor, and the other on the insulation which helps prevent the wire from wiggling around in the terminal.
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Old 03-31-2013, 04:00 PM   #6
LouSlugger
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thanks all. Will get to work.
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