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04-26-2021, 11:26 AM
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#1
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Junior Member
Join Date: Dec 2019
Location: Duluth
Posts: 6
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No 12v power
We have a 2006 Montana 5th wheel. Everything was fine at home plugged into shore power. We had to get new batteries to get the bump outs to go in. We towed out to our land with no shore power and the only thing that worked was the landing gear. The bump outs won't move, no lights, fridge or furnace.
There are 2 circuit breaker looking blocks next to the batteries, they have 12.5 volts on both sides. No fuses are blown. When we plug into the generator, it trips the GFI on the generator unless the circuit breaker for the converter is flipped off.
I disconnected the batteries, and put a continuity tester from the power cable behind the fuse box in the bathroom. There is continuity from both the positive and negative leads for the battery. Does this mean a short circuit somewhere?
Any ideas where to look for the problem?
Thanks
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04-26-2021, 09:09 PM
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#2
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Senior Member
Join Date: Jul 2013
Location: Box Elder
Posts: 2,909
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Were the new batteries installed correctly, positive to positive and negative to negative. If, during the install, was it possible that they were accidentally connected backwards, even for just a second? If this happened, the reverse polarity fuses are blown, and will need to be replaced so your converter can operate to charge your batteries. When you connect the generator, besides the converter, is there anything else turned on, water heater, fridge, or anything else. That breaker on the generator is not a GFI, it is just a regular breaker and is probably just tripping due to excess load. Is there a battery disconnect switch between the batteries and the converter? If there is, that needs to be closed so battery power can go to the 12 volt side of the panel.
__________________
Bob & Becky
2012 3402 Montana
2012 Chevy 2500HD D/A CC
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04-26-2021, 11:18 PM
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#3
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Senior Member
Join Date: Feb 2019
Location: Wickenburg
Posts: 3,314
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Depending on what you mean by "landing gear," the syndrome you describe 100% matches the problem of having turned off the battery disconnect switch. Don't know where it is in your model, but I'd start in the storage compartment closest to the battery.
__________________
2019 Cougar 26RBSWE
2019 Ford F-250
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04-27-2021, 02:03 AM
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#4
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Site Team
Join Date: Oct 2011
Location: Joppa, MD
Posts: 11,751
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Quote:
Originally Posted by Harth
We have a 2006 Montana 5th wheel. Everything was fine at home plugged into shore power. We had to get new batteries to get the bump outs to go in. We towed out to our land with no shore power and the only thing that worked was the landing gear. The bump outs won't move, no lights, fridge or furnace.
There are 2 circuit breaker looking blocks next to the batteries, they have 12.5 volts on both sides. No fuses are blown. When we plug into the generator, it trips the GFI on the generator unless the circuit breaker for the converter is flipped off.
I disconnected the batteries, and put a continuity tester from the power cable behind the fuse box in the bathroom. There is continuity from both the positive and negative leads for the battery. Does this mean a short circuit somewhere?
Any ideas where to look for the problem?
Thanks
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What size generator are you using and what is turned on in the camper? Can you clarify the statement "disconnected the batteries, and put a continuity tester from the power cable behind the fuse box in the bathroom. "?
__________________
Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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05-02-2021, 07:22 AM
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#5
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Junior Member
Join Date: Dec 2019
Location: Duluth
Posts: 6
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I traced the wire going from the battery to the fuse box and it was pinched between the floor and the metal joists. After 16 years it finally wore through and shorted out. I'm lucky the trailer didn't burn up.
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05-02-2021, 07:38 AM
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#6
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,341
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Glad you found it. better that its the 12VDC and not the 120VAC like I found once
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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