Flickering lights on 110 Not battery - Fiberglass RV


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Old 03-27-2013, 09:26 AM   #1
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Flickering lights on 110 Not battery

Hi there. When the lights in my Scamp are on battery power they are fine. When I plug in to an electrical outlet they flicker/pulse. I am going to try cleaning the battery terminals? Any ideas to stop the flickering? Thanks again.
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Old 03-27-2013, 09:48 AM   #2
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Can you put a multimeter on the output of the converter? It sounds like it may be on the fritz.
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Old 03-27-2013, 10:30 AM   #3
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Can you put a multimeter on the output of the converter? It sounds like it may be on the fritz.
I don't have a multimeter, maybe I'll go pick one up. The roof fan works fine, no pulsating, as well as the AC unit. Why would the lights pulse, and not anything else? Also, I noticed a fuse box on the front of the converter with breakers, anything I can do there? The lights work fine off the battery.

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Old 03-27-2013, 10:34 AM   #4
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If the battery is fully charged, the lights should stay on constant regardless of your connecting the trailer to 120V, as they would draw from the battery. It could be something to do with the converter though, if for some reason it was causing spiking in voltage, which would not be good.
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Old 03-27-2013, 10:35 AM   #5
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Originally Posted by arashaw View Post
Hi there. When the lights in my Scamp are on battery power they are fine. When I plug in to an electrical outlet they flicker/pulse. I am going to try cleaning the battery terminals? Any ideas to stop the flickering? Thanks again.
Check the fan on the converter to be sure it is running. Sometimes , when the fan fails it will cause the 12V lights to pulse. Also a militant dust bunny may have lodged itself in the fan.
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Old 03-27-2013, 10:41 AM   #6
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If the battery is fully charged, the lights should stay on constant regardless of your connecting the trailer to 120V, as they would draw from the battery. It could be something to do with the converter though, if for some reason it was causing spiking in voltage, which would not be good.
I think the battery is fully charged as the camper was plugged in over night. That would charge it, correct?
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Old 03-27-2013, 10:43 AM   #7
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Check the fan on the converter to be sure it is running. Sometimes , when the fan fails it will cause the 12V lights to pulse. Also a militant dust bunny may have lodged itself in the fan.
I will check the fan. Curious, during operation, should it always be running constant? I will try to visually inspect for "militant dust bunnies."
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Old 03-27-2013, 10:55 AM   #8
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Upon visual inspection, the fan is "pulsing but not spinning." It wants to go every time there is a tick/pulse of electricity. The noise is coming out right from the fan.
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Old 03-27-2013, 10:59 AM   #9
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Here is a video of the fan.
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Old 03-27-2013, 11:02 AM   #10
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I would say there is something definitely amiss with your converter. Maybe someone else has had similar problems and might help further.
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Old 03-27-2013, 12:01 PM   #11
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With camper unplugged you are probably seeing around 12V to 12.6V at the lights. When plugged into shore power the convertor may charge as much as 14.2V.

If the convertor is having issues the voltage may be varying from 12.6V to 14.2V as it shuts itself on and off. As pointed out the cooling fan not turning will cause the convertor to shut down as it's internal temperature get too high. It then turns back on after it cools. It then repeats the cycle. There are other possibilities such burnt contacts, load transistor starting to fail, or voltage smoothing circuit failure. But lets start with easy first.

From the video you posted I would say the fan driver on the convertor circuit board may be crap. You could try replacing the fan and seeing what happens, but it may just be time to replace/upgrade the convertor.

Jason
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Old 03-27-2013, 01:19 PM   #12
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Are you using LED lights? if so try replacing one bulb with a regular bulb and that might cure the problem. Had that problem when I went to all LED lights in my house. Replacing one bulb in each circuit with a non LED stopped the flicker.
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Old 03-27-2013, 01:28 PM   #13
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With camper unplugged you are probably seeing around 12V to 12.6V at the lights. When plugged into shore power the convertor may charge as much as 14.2V.

If the convertor is having issues the voltage may be varying from 12.6V to 14.2V as it shuts itself on and off. As pointed out the cooling fan not turning will cause the convertor to shut down as it's internal temperature get too high. It then turns back on after it cools. It then repeats the cycle. There are other possibilities such burnt contacts, load transistor starting to fail, or voltage smoothing circuit failure. But lets start with easy first.

From the video you posted I would say the fan driver on the convertor circuit board may be crap. You could try replacing the fan and seeing what happens, but it may just be time to replace/upgrade the convertor.

Jason
Any recommendation for a replacement converter that would fit/size the cut out in the fiberglass bench where it sits at present? I called American and he said this model was discontinued and it was probably a bad motherboard.
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Old 03-27-2013, 04:59 PM   #14
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My egg has a fancy battery charger (progressive dynamics, I think). I plan on replacing it down the road with a proper RV converter or even an inverter/charger. But the one I want is $900 to $1100.

Hopefully someone else can chime in with some good suggestions.

Jason

PS, I fix stuff for a living. That's how I know electrical, among other things.
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