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Old 06-25-2018, 01:35 PM   #1
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2005 Signature Erratic Electrical Issues

The lights in out Sig started flickering over the winter in Arizona. Seems to only happen when the galley lights and bedroom lights are on at the same time. After that when i pushed the light button on the panel in the lavatory room the shades in the living room started operating. The rope lighting switch in the lavatory room would turn the closet light on and off. The fan switch would make the drivers slide move. This doesnt happen all the time its very erratic. Had it at the shop for 6 weeks and it never did it once. Took it home and 2 days later it did it again. This time the fantastic fan in the hallway started all on its own and the diesel aqua hot fired up with out even touching any other switches.
Any suggestions.
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Old 06-25-2018, 02:26 PM   #2
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Never heard of so many things electrical happening like that, Might be time for Ghost Busters
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Old 06-25-2018, 02:45 PM   #3
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I forget what they call it but some of the hi-end Monacos have a buss system, similar to those in computers, that operate the lights etc based on inputs from the switches. The switches are not wired directly to the affected component. If you have that system I don't know what to tell you! On our nonbussed coach the lighting has gone haywire when the house batts failed and the 12vdc was supplied solely by the inverter. Does it do this when you are plugged in to shore power or on batt power?
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Old 06-25-2018, 04:11 PM   #4
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Hi ! Welcome to IRV2! We're sure glad you joined the gang!

Possible problem in the "salesman's switch"

Good luck, happy trails, and God bless!
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Old 06-25-2018, 04:52 PM   #5
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Quote:
Originally Posted by ClaytonHardy View Post
The lights in out Sig started flickering over the winter in Arizona. Seems to only happen when the galley lights and bedroom lights are on at the same time. After that when i pushed the light button on the panel in the lavatory room the shades in the living room started operating. The rope lighting switch in the lavatory room would turn the closet light on and off. The fan switch would make the drivers slide move. This doesnt happen all the time its very erratic. Had it at the shop for 6 weeks and it never did it once. Took it home and 2 days later it did it again. This time the fantastic fan in the hallway started all on its own and the diesel aqua hot fired up with out even touching any other switches.
Any suggestions.
Does the 05 sig's have the intellitec multiplex system for lighting? if they do, I"d call M&M electronics. (419) 965-3014. good customer service and they will help you troubleshoot.
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Old 06-26-2018, 05:19 AM   #6
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You have the Intellitec Multiplex system.

If a fluorescent light is bad it can cause erratic things.

Look at the multiplex panels, I assume the computer is in thr rear closet. Do any of the modules list the main things that are erratic? You can swap similar panels but be sure to keep track of the switch positions on the panel as you move them. A bad module can cause the problem. Those modules are scattered around the coach, a bunch are above my windshield.

The switch panels can also cause the problem. It's easy to pull one at a time and unplug it to see if the problem goes away.
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Old 06-26-2018, 09:30 AM   #7
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I'm going thru basically the same thing with my multiplex system. And you're lucky... all of my lites are dead.


As Bill noted, give M&M a call. They'll walk you thru it.
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Old 06-26-2018, 10:11 AM   #8
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One thing I would suggest trying. Take all of the power off the coach. No shore power and disconnect the batteries, all of them. Donít just turn off the disconnect but remove the cables from the batteries, let it sit for an hour or so the reconnect. Let it settle in for some time and see if it got its brain back. Worked for me.
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Old 06-26-2018, 10:19 AM   #9
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So far (knock on wood) my Intellitec system is working fine. I did buy some pushbutton panels for spares though since they may get hard to find in the future.
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Old 06-26-2018, 11:16 AM   #10
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Thanks for all the reply's. Yes I do have the Multiplex system. All of the modules that I have ever found are in my back closet. So last night I did find something unusual. I have everything shut off and there was still one light on on one of the modules. It was telling me that the galley baseboard heater was on. Funny thing is I don't have a galley baseboard heater. I pulled the one amp fuse and turned on the lights that usually flicker. Surprise no flicker. Not sure if this has solved the problem because of how erratic it can be. See what happens on this long weekend. Next step will be to unhook all power supplies and hopefully it will do a reset.
It happens whether I am plugged to shore power or not. The worst episode was when we were on our way home from Arizona in April while driving. Aqua hot heater fans wouldn't even work.
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Old 06-26-2018, 03:58 PM   #11
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Quote:
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One thing I would suggest trying. Take all of the power off the coach. No shore power and disconnect the batteries, all of them. Donít just turn off the disconnect but remove the cables from the batteries, let it sit for an hour or so the reconnect. Let it settle in for some time and see if it got its brain back. Worked for me.
That is good advice, don't forget the solar....
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Old 06-26-2018, 04:40 PM   #12
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Quote:
Originally Posted by ClaytonHardy View Post
Thanks for all the reply's. Yes I do have the Multiplex system. All of the modules that I have ever found are in my back closet. So last night I did find something unusual. I have everything shut off and there was still one light on on one of the modules. It was telling me that the galley baseboard heater was on. Funny thing is I don't have a galley baseboard heater. I pulled the one amp fuse and turned on the lights that usually flicker. Surprise no flicker. Not sure if this has solved the problem because of how erratic it can be. See what happens on this long weekend. Next step will be to unhook all power supplies and hopefully it will do a reset.
It happens whether I am plugged to shore power or not. The worst episode was when we were on our way home from Arizona in April while driving. Aqua hot heater fans wouldn't even work.
I had a erratic problem as well. It took me 2 years to figure it out. Mine would only flicker when on generator power and a full load. Once I knew what the conditions were, so I could duplicate the problem, it was much easier to zero in on the cure.

Without your 'galley baseboard' fuse, does everything still work? Maybe mislabeled or it's a spare.
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Old 06-27-2018, 11:09 AM   #13
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So far so good without the Baseboard Heater fuse but it hasn't been tested a lot. I will know better after the long weekend. Talked to Chris at M&M Electronics and he doesn't think that fuse will make any difference. He thinks the issue is either with one of the fluorescent lights or a grounding issue on one of the grounding bars. He is betting the florescent lights are causing the issue. Chris says the ballasts in the fluorescent lights break down over time and cause some radio waves that mess with the Multiplex system. Another thing he said to try was disconnecting all power, shore and batteries, and it may reset. I'm looking for LED replacement lights for the fluorescents.
Don't know why the Baseboard Heater fuse is there. There is also one for a lavatory baseboard heater that I don't have. I'm sure ill have more to add next week when we get back.
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Old 06-27-2018, 11:42 AM   #14
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"Talked to Chris at M&M Electronics and he doesn't think that fuse will make any difference. He thinks the issue is either with one of the fluorescent lights or a grounding issue on one of the grounding bars."

Chris is a very competent fellow. And he is alluding to something that is responsible for countless electrical/electronic gremlins in Monaco coaches--BAD GROUNDS and poor connections.

Although I have NO experience with multiplex, I've had extensive experience with gremlins. On both my Monaco coaches, I spent an entire Saturday pulling EVERY fuse, and EVERY connector (there are hundreds of them in dozens of locations--all day job), spraying them with WD-40 and reconnecting. Did the same with every ground buss bar I could find. On the 93 Dynasty, this STOPPED the multitude of gremlins I had experienced immediately. On the present coach (2000 Dynasty) I think that procedure prevented me from ever having problems, even though the previous owner had many problems.

If you choose to do this as a preventive maintenance procedure, you will be surprised by how many corroded connections you find, and how many screws are loose, especially on ground buss bars.

Anyone can do it, and it costs almost nothing but time. I'm just sayin'...
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