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Old 06-08-2015, 07:52 PM   #1
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1978 31' Sovereign
Cold Lake , Alberta
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No power to Univolt plug?

hey guys,

I'm going through my recently adopted '78 Sovereign and the Univolt plug under the front seat doesn't receive power...

I've tested all the other outlets attached to this circuit and confirmed operation of the Univolt itself by plugging it into another outlet.

Any ideas what's going on here?
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Old 06-08-2015, 09:36 PM   #2
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1974 31' Sovereign
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Check for a light switch in the area. There is usually one before that outlet so you can turn the univolt on and off without having to plug and unplug it. It's usually just a single switch metal box attached to the wall nearby.
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Old 06-08-2015, 10:10 PM   #3
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Thanks! I had thought the same initially, but nothing is jumping out at me right away. All the curtains are off and the cushions off the couch, but nothing so far. I think it would be pretty strange if this outlet just didn't work...
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Old 06-08-2015, 10:35 PM   #4
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The switch on my 79 was just outside the blue box containing the univolt. It would be strange for that one outlet not to work. Check the circuit breakers, I can't remember right now 100% but that outlet may have been on a separate circuit.
If it's in a metal outlet box inside the blue box like mine was you may just want to look inside it to make sure nothing's loose. Although loose 120v would cause other problems. Turn the power off first.
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Old 06-08-2015, 11:30 PM   #5
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Doesn't seem to be a switch anywhere, and the outlet is well attached.

The owners manual leads me to believe this plug is at the end of one circuit, which includes the external outlets, the centre twin beds and the Univolt. They all work, except the Univolt. All breakers are on.

My suspicion now is that the outlet itself has corroded or failed, but again, seems improbable... I'll change it out tomorrow and see if that gets me anywhere.
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Old 06-09-2015, 11:39 AM   #6
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Can you provide some pics? I went through a fair bit of inviolate issues on my 69 GT so I might be some help. You can email too if that is easier. frameandfocus@gmail.com
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Old 06-09-2015, 02:35 PM   #7
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I'd love to - what would you like to see photos of?
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Old 06-09-2015, 03:02 PM   #8
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Turn the power off and remove the receptacle to the point that you can test the wire feeding the receptacle. Power on and with a meter. It is unlikely that the receptacle would fail but you won't know till you test it.

If there is no power on the wires you will have to make a judgement as to which receptacle is just before that one and test there. Test till you find the open.
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Old 06-09-2015, 06:52 PM   #9
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1978 31' Sovereign
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No luck, the plug is not receiving power at all.

All the other outlets in the trailer function. Not sure how to test where the break is now? It must be between the last plug on the circuit and the Univolt. The owners manual leads me to believe this is the street side bedroom. Opening up the plug revealed a solid black braided cable coming from the top of the outlet housing (I think all the cables run through there). Not sure how to test that...

What's my next step?
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Old 06-09-2015, 07:05 PM   #10
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Back to my trailer today, able to grab my. 78 service Manila. How long is your trailer, doesn't show on my phone. Outlets are broken up into multiple circuits, so let's be sure Univolt is on the one you're testing.
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Old 06-09-2015, 07:06 PM   #11
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Center or rear bath if it's a longer trailer?
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Old 06-09-2015, 07:13 PM   #12
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Sorry, sovereign so I'm guessing 31'. Looking at wiring for all lengths, the univolt seems to be on a separate circuit from 'most' other outlets, but always seems to be on circuit that feeds the polarity light and exterior outlet. Check for power to the exterior outlet .
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Old 06-09-2015, 07:15 PM   #13
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Check wiring connections in the polarity light box, hopefully not to difficult to get to.
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Old 06-09-2015, 09:31 PM   #14
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1978 31' Sovereign
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Trailer is a 31 ft sov, rear bath.

Exterior plugs work fine.

I'll check for the polarity lights.

Starting to wonder more about a hidden switch....
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