Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 13, 2025 ...

Lights Dimming in Bedroom

March 24, 2023, 07:10:03 am

On my iH45 suddenly our bedroom ceiling lights went  to about half power. All at once. Not any single one but all of them. Then a few days later the living room ceiling lights have done the same. They have not changed or gone back to full  power but remain in a dim state. Any ideas?

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Re: Lights Dimming in Bedroom

Reply #1 – March 24, 2023, 09:23:51 am

I had though the lights at the master dresser were getting dim. I then thought the lights in the master slide were getting dim.  I then thought it was just me and have not investigated. I know the newer coaches then mine had where they could dim any of the lights, In 2014 model we only have on or off.  No dimming option.  When I get back home Sunday I will have to look into this.

This problem could be caused by 1 of 3 things.
1. The lights are going bad. This is not likely in my case since it was not just one but all at the same time.  Or so I think. It is possible that I missed seeing 1 go dim at a time but I think the wife would have brought it to my attention to fix if there was only 1 dim.

2.  The switch controller is going south. The control for these lights is under the bed on the  left side.  There are a number of modules there.  Will need to get volt meter down there and check to see if voltage coming in module is the same as going out.

3.  Bad power or ground to a module.  I don't think that is. The problem since you said it started in only 1 spot.

Update, I have included a picture of one of the modules under the bed. it is looking like this location may not be where the module is that is for your lights. At least it looks like mine is going to be somewhere else.

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Re: Lights Dimming in Bedroom

Reply #2 – September 12, 2025, 01:26:33 am

Either of you figure out what was going on with your lights?  My bathroom ceiling lights just went to about 50% power.
Thanks,

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Re: Lights Dimming in Bedroom

Reply #3 – September 12, 2025, 07:30:33 am

Have you used your digital voltmeter to check voltage at the fixture?

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Re: Lights Dimming in Bedroom

Reply #4 – September 12, 2025, 10:05:23 am

I should have posted my solution. 

Since the wife had noticed that the lights were dimmer I was not in a big rush to fix.

I found the problem by accident.  The light switches and light control modules talk to each other via the RV-C protocol.  The switch sends a message to the module to turn a light on, off, or toggle.  The modules in my coach are supposed to be  either on or off with no dimming, but for some reason they dimmed the lights.  I am assuming that the switches only send a toggle to the modules.

I was wanting to add remote access to systems in my coach like the newer ones have.  eRvin is what I went with.  I had to do a bunch of programming since it was designed for Entregra Coaches.  In my programming I programed for the switches to turn on at 100% since the modules were non dimming.  To my surprise when I turned the lights on via eRvin they came on full brightness. Now when I use the wall switch they come on at full brightness.  I have not figured out what caused them to dim,  unless some computer glitch.

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