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Old 02-10-2012, 08:22 PM   #1
Holiday Rambler Owners Club
Join Date: Feb 2012
Posts: 67
no 12volt without generator

I just picked up my new (to me) 1997 DamonUltrasport 35' motorhome. I've discovered that I only have 12v in the coach when the generator is running. the chassis is fine. I've checked the 3 batteries and they all show 12 volts. the cables running to the front of the convertor have no power. I haven't been able to try plugging the cable in because it is a 50 amp cable and I don't have an adapter. Is there a switch somewhere I haven't found? in my old Champion there were on/off switches inside the door for the coach and chassis, but I haven't found anything like that. Does anyone have any idea what I am missing?

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Old 02-10-2012, 09:13 PM   #2
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Have you checked the circuit breaker switch on the genset yet?

'98 Gulf Stream Sunsport 325, 7.5L Banks Power Pack, Koni FSD's, Air Bags, ReadyBrute Elite,
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Old 02-10-2012, 09:31 PM   #3
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Both breaker switches on the genset are on, but the gen works fine. the only time I have 12v in the coach is when it is running, nothing in the coach when it is off.
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Old 02-10-2012, 09:42 PM   #4
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There is a switch on the left side dash that turns off the coach batteries. My 98 has a emblem of a battery with a circle slash over the switch. Also under the hood in the 12v load center there are 3 relays that control the batteries. You can do a search for the load center pdf file which has wiring schematic. Hope this helps
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Old 02-11-2012, 07:22 AM   #5
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You are getting power when the converter runs, but not from the batteries. First thing to check is the house battery disconnect switch - is it on? If, so you determine if the relay is operates is working? Also, there may be a large cartridge fuse between the house 12v distribution system and the house batteries. My coach has a 300 amp fuse inline there.
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2004 American Tradition; 2013 Buick Verano
Homebase in the Ocala Nat'l Forest near Ocala, FL
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Old 02-11-2012, 11:28 AM   #6
Holiday Rambler Owners Club
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Possible solution

I found an adapter and plugged into shore power and everything works, Pulled the dash switch and checked it for continuity and found none. suspecting a bad switch now, will be looking for a replacement. Wasn't sure what the switch was for before, since it didn't see to do anything. Thankss to everyone for their help, will post again when I find out for sure. the switch has a purple and and black on one side and a purple and white on the other, tempted to try jumping them, but I'm afraid I'll make things worse. the good news is that I have 12v in the coach without having to run the generator.
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Old 02-11-2012, 12:40 PM   #7
Join Date: Dec 2011
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On my 98 the switch operates the battery solenoids which disconnects the house batteries and for emergency start. The battery load center is located under the hood on the drivers side, black box mounted on fire wall. This is where the solenoids are that the switch controls. Send me a PM with your email address and I will send you a copy of load center pdf file.


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