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Old 05-08-2015, 18:14   #1
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lights flickering

The cabin lights run off of the battery. We are on shore power and the battery charger comes on when needed. My question is what would cause the cabin lights that run off the battery to flicker, dim and then return to a normal state.
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Old 05-08-2015, 18:37   #2
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Re: lights flickering

Maybe your bilge pump or fridge coming online?

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Old 05-08-2015, 18:40   #3
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Re: lights flickering

do not have a fridge and bilge pump is not running. We also do not have AC.
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Old 05-08-2015, 18:42   #4
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Re: lights flickering

Yes, probably something else turning on and dropping the voltage. Do you have a battery monitor or at least volt and amp meters?
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Old 05-08-2015, 18:47   #5
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Re: lights flickering

Yes we do and we will monitor them. Thanks for the suggestions.
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Old 05-08-2015, 18:50   #6
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Re: lights flickering

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Originally Posted by dearmstr View Post
The cabin lights run off of the battery. We are on shore power and the battery charger comes on when needed. My question is what would cause the cabin lights that run off the battery to flicker, dim and then return to a normal state.
If there is nothing else that started and is running when this happens then I would suspect a corroded or loose ground wire or any of the other wires that might be connected to your lights. If you have very old wiring then it might be suspect. I hope you can find the culprit but first check out ground wires.

If they all flicker and dim at the same time then there is one common wire problem. If it is just one light or maybe just the lights in the galley or just the cabin then you can assume that a common wire to just that space is not connected correctly.

You did not mention what kind of lights you have. There are several different styles and what you have said so far is that they are 12volt. They could be flourescent, led, or halogen as well as just 12v auto style bulbs.

Good luck in your search.
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Old 05-08-2015, 18:55   #7
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Re: lights flickering

The lights are LED. And at the time that it happened we only had one light on. All the fans that run off the battery were also running.
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Old 05-08-2015, 19:17   #8
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Re: lights flickering

>"My question is what would cause the cabin lights that run off the battery
>to flicker, dim and then return to a normal stat
e"

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Originally Posted by dearmstr View Post
The lights are LED. And at the time that it happened we only had one light on. All the fans that run off the battery were also running.

So just one LED light flickered on one occasion and that's it?
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Old 05-08-2015, 19:30   #9
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Re: lights flickering

Yes. I failed to mention that the light in the shower stopped working a couple of weeks ago and I think that with that light there is a loose connection.
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Old 05-08-2015, 21:06   #10
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Re: lights flickering

Can you make it do it again? Does it happen to all the lights that are on at the same time? Is the light in the shower on the same circuit? I know that's a lot of questions but it might help narrow it down. It really sounds as if you have a bad connection.
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