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Old 09-16-2011, 09:54 PM   #1
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12v light issue

Having a problem 12v lights go dim then bright about every 5 minutes. Occasionally they pulsate for a minute or 2. thinking power converter as batteries are good. anybody had this?? This is on a Winnebago Voyage 2007
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Old 09-16-2011, 10:04 PM   #2
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Is this when you are connected to shore power, running generater or just running off battery power alone?
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Old 09-17-2011, 08:04 AM   #3
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It sounds like a typical short. The next time it starts, go to the converter and listen. If it is something shorting out, you will hear the converter straining to keep up.(it will get louder each time the lights dim) Start by turning off one 12volt light at a time. If it still happens next remove one house 12volt fuse at at a time. Finally remove the battery cables one at a time. This will tell you which area you have a problem. also check at the converter output wire. many times they put in a 12volt automatic circuit breaker. these can get weak and cause this problem.
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Old 09-17-2011, 10:11 AM   #4
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My unit has the round pop out circuit brks. I dont think they can be shut off. I can reach the converter and it feels pretty warm. then the fan kicks on for 20? seconds, the lights get bright and then it kicks off, diming the lights.
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Old 09-19-2011, 06:10 PM   #5
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Have you tried running the lights with just the batteries and not the converter? It almost sounds like your converter is starting to go. I would make sure your batteries are charged. See if the lights work ok on just the batteries. If they do, I would say your converter is not putting out right. You can check for voltage at the line out of the converter as someone applies lights and see how much of a voltage drop you are getting as lights are turned on.
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