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Open Roads Forum  >  Class A Motorhomes

 > Overhead Lights dimming in coach

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rasnyder

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Posted: 01/18/12 12:48pm Link  |  Print  |  Notify Moderator

Has anyone experienced your overhead lights dimming in your RV. I am being told by a repair shop that it is normal for the overhead lights to dim and then all of a sudden to get bright. Camper World replaced my two 6 volt batteries as they said they were weak and they checked out my converter and said it was working properly. At night when we are sitting around the lights will get maybe 15% dimmer and then brighten back up in just an instant and then start this dimming routine all over. This pattern usually repeats itself about every 15 to 20 minutes. I posted an earlier question on my problem and got some great advice. I just don't recall in the past that I ever noticed this dimming pattern in previous RV's although Camper World is trying to convince me they fixed my problem. I have a 2007 Fleetwood Bounder motor home. Sure would appreciate any comments. thanks

MountainAir05

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Posted: 01/18/12 12:59pm Link  |  Print  |  Notify Moderator

I would check grounds from the fuse to all the lights. Remember that most lights are daisy chained. If they all dim then start back at the 12v fuse and if not start at the last light to dim and work toward the end. A loose ground will cause this . Does it do it also when plug into Shore power and the generator, or just on battery power.

donn0128

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Posted: 01/18/12 01:11pm Link  |  Print  |  Notify Moderator

Bad ground, bad battery, bad converter.
Check all three, starting with the battery.


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FIRE UP

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Posted: 01/18/12 01:20pm Link  |  Print  |  Notify Moderator

rasnyder,
While a bad or insuffecient ground could possibly be the culprit, I would think that if it were a potentially bad ground, it would present dim lights ALL the time, not cycle a dim, bright, dim situation. This is odd because there seems to be a few lately with the very same problem. Others have stated they changed the "converter" because it was going bad and that did the trick. I'm not sure how and why but, that's what some have said. Most of the time, a converter is not in play when boon docking but, what the heck do I know.

It, as far as I know, only comes into play when plugged into shore power or running a generator. I'd maybe try and run a simple test. Hook up a volt/ohm meter to the battery posts when this "cycling" begins and see if there's fluctuation in the voltage.

We've had four different motor homes and, as of yet, have not experienced this issue. Let us know what you find out.
Scott


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garry1p

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Posted: 01/18/12 06:25pm Link  |  Print  |  Notify Moderator

If you are plugged into shore power and this is happening the converter is cycling on and off it may be a heat problem in the converter. Most converters have an internal fan to prevent overheating.

Could be a failing converter but what you describe is not a normal situation.

Your converter should not run hot but slightly warm.

If you can use a meter the voltage at the battery should be around 13 to 14VDC and not go below 12.8 if the converter is working OK.


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bluwtr49

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Posted: 01/18/12 07:08pm Link  |  Print  |  Notify Moderator

If you have a converter instead of an inverter it's pretty normal. All my previous TT's with converters did that...now the MH with an inverter it's quite stable.


Dick

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ArchHoagland

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Posted: 01/18/12 09:25pm Link  |  Print  |  Notify Moderator

Are you on shore power when this occurs?


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Posted: 01/19/12 06:46am Link  |  Print  |  Notify Moderator

It could be a bad water pump cycling on and off.

tgobob

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Posted: 01/19/12 08:30am Link  |  Print  |  Notify Moderator

I experienced this same problem and it turned out to be caused by my water pump. Apparently the water pump had a leaking internal check valve which caused the pump to cycle even when we weren't using water (the pump was "on", but shouldn't have been pumping). To very simply rule out this possibility just turn your water pump "off" while the lights are on and see if the lights are affected. By the way, a new water pump solved my problem.


tgobob
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deandec

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Posted: 01/19/12 11:20am Link  |  Print  |  Notify Moderator

Water heater, water pump, furnace, competing with lighting system?

Make sure the connections at the battery terminals are clean and tight.


Dean
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