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Old 06-07-2014, 01:44 PM   #1
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12v interior light flickering

The 12v lights have a slight flicker the incandescent and LEDs both flicker. And I have noticed when the exhaust fan in the bathroom is on and you turn on a 12v light it seams to slow down. I recently cleaned the posts on the house batteries and it seamed to go away for about 2 weeks now its back. What else do I need to check the coach batteries are about 4 years old and we fulltime so the batteries are always being charged and the water is full. I checked with a volt meter 13.6 12v and 6.5 each 6v. What else should I check or is this normal?
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Old 06-07-2014, 02:12 PM   #2
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If it's happening when on shore power, it could be your converter/charger kicking in to charge batteries then shutting down again. Other idea is carefully check what else is on that might only need power intermittently. Does your refrigerator have heat coils to dry condensation around door seal? If you hook a volt meter up and leave it on while a flicker happens in the lights, you might catch the voltage fluctuation. Another thing, you said you cleaned battery terminals, how about the ground connection?
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Old 06-08-2014, 02:41 AM   #3
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I would start checking your grounds to chassis frame for house batteries, converter/inverter and Gen to frame.
You may want to check the wire connections in your transfer switch, three sets of wires, shore power cable, the load center wires and Gen wiring from Gen.
If you have loose wiring can build up heat and melt insulation on wires and other complications.
Here are some Tech tips.
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Old 06-08-2014, 04:48 AM   #4
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My converter was on the way out when that started happening to me. I replaced it and never had a flicker again.
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Old 06-08-2014, 06:47 AM   #5
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I had the same issue on my 2010 Hurricane. Traced the problem to my convertor. Replaced convertor and batteries, no further problems. Opened old convertor and found circuit board had overheated with burn marks on the board.

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Old 06-08-2014, 06:51 AM   #6
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You need to actually check voltage when this is happening, but most likely the converter or bad batteries or a combination.

You checked battery surface charge. Check them with a load when the problem is occurring too, then check the voltage at the converter.
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Old 06-08-2014, 09:57 AM   #7
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Recently when we were driving, I hit a bump and the EMS beeped and I lost 12v power. When plugged into shore power the 12v worked but I noticed a dimming of a light when more than one was turned on. New batteries did not alleviate the problem.

I called the Mfg and they suggested checking the solenoid to the House Battery. There is a switch that turns the house batteries on/off and the solenoid on my vehicle was located behind a panel in my electrical compartment. Since I was having some other work done I asked the service department to check it out.

They did, and they found that by tapping on the solenoid the 12v system would cut on and off. It has been replaced and when I picked it up all seems to be working as expected.

So, check the house system solenoid controlled by the house disconnect switch. Could even be the switch.

Just thinking out loud.
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Old 06-08-2014, 09:39 PM   #8
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Sounds like I have my work cut out for me thanks for all the info.
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Old 06-08-2014, 11:19 PM   #9
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Please let us know what the problem is when you find it.
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