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Old 10-04-2016, 05:35 PM   #1
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12 volt failure!

I have a 2006 Monaco Dynasty which was in a paint shop for a touch up for 6 days. When I picked it up I noticed all 12 volt in the coach was dead. Of course the paint shop didn't have a clue. I recently replaced all of the "house" batteries (which tested dead) so I took it to the shop that had replaced them. They suggested plugging it in for a couple of hours. After 3 hours it was still dead. I left it there but they can't get to it for 2 weeks! Anyone else have a similar problem?
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Old 10-04-2016, 05:44 PM   #2
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This sounds like someone hit the salesman switch that shuts off the house 12 volt system. The salesman switch is usually mounted near the front door. Mine is on the left side as you are going in, mounted at the end of passenger side console.
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Old 10-04-2016, 05:51 PM   #3
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Your batteries were allowed to run flat. In that condition they draw more current than the house converter can supply so it shuts itself off before it toasts itself. The answer is a large external charger possibly with a current limiting resistor and enough time to run the batteries up to around 10-11 volts. At that point the Converter should be able to handle it. Your batteries were damaged in they lost capacity from this move. How much they were damaged is hard to predict from here.
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Old 10-05-2016, 02:53 PM   #4
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i have learned that if you bring in a coach for repairs and its going to be more than 2 days you have to teach someone to take care of the "in use switches" or pluging in ect...i had that happen to my old Swinger class a... its really not there fault but should take care...we as users know this stuff and if to forget to let someone know or just forgot..i dunno i would not hold them responsible..there auto body not rv tech's.. and i dont mean to sound harsh, its just that it happened to me and when talking to the supervisor at shop he said if i would have told them it would be done and there mistake if not... not saying you didnt do this its just a thought..not saying you to blame either without knowing whole story..
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Old 10-09-2016, 06:02 AM   #5
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My 1996 Winnebago Adventurer suddenly has no interior lights or any thing that should work from the house batteries. The generator isn't getting starting power either.
The batteries are all good and showing 12+ volts. All fuses I could find are good. Would the converter suddenly fail?
What am I missing?
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Old 10-09-2016, 06:16 AM   #6
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There is a relay that controls the DC inside coach and is controlled by the salesman switch near steps in door area.
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Old 10-09-2016, 06:16 AM   #7
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Quote:
Originally Posted by Bo Walker View Post
My 1996 Winnebago Adventurer suddenly has no interior lights or any thing that should work from the house batteries. The generator isn't getting starting power either.
The batteries are all good and showing 12+ volts. All fuses I could find are good. Would the converter suddenly fail?
What am I missing?
Your missing a connection from your batteries.

If the batteries are showing 12+ volts, the volts are not getting to your stuff.

Carefully check your for a circuit breaker on the positive cable, near the battery and then loose or dirty connections anywhere near the batteries.

Sometimes, a connection, that looks good, hides the corrosion well.

You also need to check both ends of the negative cables. The negative side uses the chassis as a ground cable to the generator. The builders use small self tapping screws that loosen up over time.
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Old 10-09-2016, 11:59 AM   #8
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Thank you all for your help.
My 3 batteries are under the steps. There is one positive cable connection on the wall, nothing but a connection, one bolt and positive cables. There is a disconnect/connect switch I installed to disconnect the house batteries. There is no other switches or relays in this location.
The transfer switch, if that is what it is called, is in a box on the firewall under the front so called hood. The solenoid in that box was stuck for some reason or maybe for no reason. I opened it up cleaned the contacts, put it back together and she works great.
I tried to find a new one, but failed. It's Sunday you know.
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Old 10-09-2016, 02:38 PM   #9
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I had that solenoid fail in mine, too. Believe me, it won't be easy to find a new one, either. I was fortunate enough that my old one had a part number that was still legible on it. I googled it and followed the rabbit trail of out of business businesses that were bought out by other businesses until I was able to find one that is still in business. LOL. I bought two; one to replace the existing one, and one to have on hand the next time it fails on a Sunday while camping in Death Valley. If memory serves, it was about $40.00 each when Winnebago wanted about $120 for one. I believe mine was 200 amp...
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