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08-27-2018, 07:35 PM
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#1
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Montana Master
Join Date: Dec 2010
Location: Sioux Falls
Posts: 664
M.O.C. #10985
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12 volt elect problems
Some of you electrical guru's pipe up please. When I turn the park 50 amp power off I lose all electric in camper. No lights or anything. I should rephrase that as my slide out for bedroom and living room which are electric motor driven work. The dining and kitchen are elect./hydraulic and they won't work. Level up will not work on battery either. As soon as power at pedestal is turned on all is well again. Problem seemed to start after checking battery fluid. I turned the disconnect in the battery compartment off. After that I had problems. Maybe there lies the problem. I will check with my volt meter tomorrow. The camper is a 2018 3791RD. Thanks for any help you can be.
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08-27-2018, 07:43 PM
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#2
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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Seems silly to ask, but did you turn the battery disconnect back on. Certain things still get power when the switch is off, but most things don't.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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08-27-2018, 07:50 PM
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#3
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Montana Master
Join Date: Sep 2017
Location: Tacoma
Posts: 1,567
M.O.C. #20475
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X2 with DQDick or did you knock sum-thing loose?
__________________
Bob & Carol Washington St
2017 HC HM352RL 2018 Dodge 3500 laramie CC LB 4x4
Curt Q25 with puck system, Factory air bags
Happy Trails
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08-28-2018, 07:56 AM
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#4
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Montana Master
Join Date: Dec 2010
Location: Sioux Falls
Posts: 664
M.O.C. #10985
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Quote:
Originally Posted by DQDick
Seems silly to ask, but did you turn the battery disconnect back on. Certain things still get power when the switch is off, but most things don't.
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Oh yes , I turn it on and off and on and off and on.
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08-28-2018, 08:01 AM
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#5
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Montana Master
Join Date: Apr 2016
Location: Auburn
Posts: 879
M.O.C. #18474
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Go in the battery compartment and make sure every 12v connection is tight.
__________________
2020 Montana 3790RD Legacy EditionOnan, TST TPMS, TrailAir pin, Discs,
2013 F350 DRW 4x4 CC LBViair 10007, Ride-Rites, Westin HDx, 12k Smittybilt
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08-28-2018, 08:22 AM
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#6
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Montana Master
Join Date: Oct 2017
Location: Bee Branch
Posts: 2,620
M.O.C. #20693
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Times two to all above. Especially check all connections. I would take a wire brush to each connection and move the wires around then tighten
__________________
James & Irene Wilson
Bee Branch, AR.
2017 Ram 1 ton diesel duallyCrew Cab/Long Bed
2018 Montana High Country 381TH Garage Full of Toys
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08-28-2018, 09:30 AM
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#7
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Montana Master
Join Date: Dec 2007
Location: Kansas City, Missouri
Posts: 2,710
M.O.C. #7992
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Seems to coincidental that it started after you used the battery disconnect switch. I'd try to jumper that switch. Just because you turned it back to the proper position doesn't mean it made the switch.
__________________
2006 3000RK
2009 Ram 2500
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08-28-2018, 10:04 AM
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#8
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Montana Master
Join Date: May 2006
Location: Ronan
Posts: 513
M.O.C. #5756
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Might be a bad battery also. I thinking switch also but a easy check is to load test the battery.
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08-28-2018, 01:27 PM
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#9
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Montana Master
Join Date: Oct 2017
Location: Bee Branch
Posts: 2,620
M.O.C. #20693
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Everyone that owns an RV should have a volt meter and possibly a battery load test meter. They are inexpensive and critically important to troubleshooting electrical issues
If there is one class I would recommend be conducted at rallies it would be how to use these two tools!!
__________________
James & Irene Wilson
Bee Branch, AR.
2017 Ram 1 ton diesel duallyCrew Cab/Long Bed
2018 Montana High Country 381TH Garage Full of Toys
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08-28-2018, 04:53 PM
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#10
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Montana Master
Join Date: Dec 2010
Location: Sioux Falls
Posts: 664
M.O.C. #10985
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Quote:
Originally Posted by jimcol
Seems to coincidental that it started after you used the battery disconnect switch. I'd try to jumper that switch. Just because you turned it back to the proper position doesn't mean it made the switch.
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I jumped that switch and it did not help. I used my volt meter and I have 12.75 volts in and out of it. I went into the circuit breaker/fuse box and I do not have any 12 volt power coming into it when the converter is not running.
Where is the converter located? There must be a junction box or some kind of connection at it. I cannot follow the Red 12 volt hot wire as it goes through the Bat. compartment firewall. I see it coming into the fuse box but can't see where it comes from. There must be a junction in there somewhere.
Getting this thing into a camping world is not feasable as we are full time and live in it. I do know of a reliable RV repair place but I will have to wait till we get back to MN and we are at Niagara Falls now. If I don't cook the converter I will be ok.
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08-29-2018, 09:05 AM
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#11
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Montana Master
Join Date: Apr 2016
Location: Auburn
Posts: 879
M.O.C. #18474
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Most converters are silver boxes mounted behind the wall in the basement.
__________________
2020 Montana 3790RD Legacy EditionOnan, TST TPMS, TrailAir pin, Discs,
2013 F350 DRW 4x4 CC LBViair 10007, Ride-Rites, Westin HDx, 12k Smittybilt
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08-29-2018, 09:41 AM
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#12
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Montana Master
Join Date: Oct 2017
Location: Bee Branch
Posts: 2,620
M.O.C. #20693
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Make sure you have power across the keyed switch in the water hookup compartment
As others mentioned the converter is typically a silver box mounted behind the breaker panel. If you remove rear wall of the pass thru storage you can easily access the converter and rear of breaker panel. Depending on your setup, the converter will plug into the back of breaker panel and be on a 20amp breaker. The hot wire will run up to the breaker box and then another wire will lead off that too the battery. It is that wire and your ground wire you want to check.
Might try turning off the converter and seeing if you still have power at breaker box. Then trace back to where you do have power. Also be sure to check your grounds at battery leads and at the breaker box
Let us know what ya find
__________________
James & Irene Wilson
Bee Branch, AR.
2017 Ram 1 ton diesel duallyCrew Cab/Long Bed
2018 Montana High Country 381TH Garage Full of Toys
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08-29-2018, 12:09 PM
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#13
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Montana Master
Join Date: May 2011
Location: Hixson
Posts: 3,436
M.O.C. #11397
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Quote:
Originally Posted by Golfmedik
Most converters are silver boxes mounted behind the wall in the basement.
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I can't say what year it started but our previous 2012 3585SA and current 2018 3791RD had/has the converter mounted in the main breaker/fuse box on the right side. Our 2008 3400RL did have it mounted under the steps.
__________________
2018.5 Montana 3791RD
Full Timers 9/1/2010 through 1/16/2020.
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09-02-2018, 01:42 PM
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#14
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Established Member
Join Date: Nov 2017
Location: Brooksville
Posts: 19
M.O.C. #20861
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I have a 2012 3625RE that had the same problem this summer, it was the 50 amp sealed breaker mounted on the wall behind the battery
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09-02-2018, 05:46 PM
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#15
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Montana Fan
Join Date: Nov 2015
Location: Shady Cove
Posts: 155
M.O.C. #18031
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[QUOTE=dafurrow;1114721]I have a 2012 3625RE that had the same problem this summer, it was the 50 amp sealed breaker mounted on the wall behind the battery[/QUOTE
That's what I was going to say & if it's the problem I'd replace with manual reset buss 80amp breaker.
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09-03-2018, 09:19 AM
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#16
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Montana Fan
Join Date: Feb 2014
Location: Chico
Posts: 269
M.O.C. #14041
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Since you have 12 v in and out of the battery disconnect and not in the distribution panel check the lead where it enters the converter and check the input fuze to the converter. Someone earlier said it would be a #12 red wire and 20a fuze, I would suggest a #10 and a 30a fuze. I am not experienced with this exact application but from years of similar experience it should be 30a fuze and red wire.
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09-03-2018, 09:04 PM
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#17
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Established Member
Join Date: Nov 2014
Location: Maple Ridge
Posts: 13
M.O.C. #15862
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Last year I had the same problem, and checked all the wiring. Everything seemed fine, but When I checked the second time around I was able to move the ground that was screwed to the propane compartment wall. This was the problem, it was slightly loose and nothing on the 12v system was working. I removed the screw and replaced with a bolt and haven't had a problem since. H
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09-04-2018, 07:16 AM
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#18
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New Member
Join Date: Jul 2018
Location: Flagler Beach
Posts: 3
M.O.C. #22280
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Quote:
Originally Posted by shovelhead86
Some of you electrical guru's pipe up please. When I turn the park 50 amp power off I lose all electric in camper. No lights or anything. I should rephrase that as my slide out for bedroom and living room which are electric motor driven work. The dining and kitchen are elect./hydraulic and they won't work. Level up will not work on battery either. As soon as power at pedestal is turned on all is well again. Problem seemed to start after checking battery fluid. I turned the disconnect in the battery compartment off. After that I had problems. Maybe there lies the problem. I will check with my volt meter tomorrow. The camper is a 2018 3791RD. Thanks for any help you can be.
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I have the same camper and the same problem. changed the 50 amp relay behind the battery, everything 12 volt worked. when I tried the kitchen slid out the solenoid for the hydrolic system stayed on when I disconnected the 12 volt wire to it, I burnt my fingers. I believe this was the problem with the relay. I have checked all the wiring to the battery to make sure it is charging.
the batteries go dead after sitting for a day????
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01-31-2020, 01:21 PM
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#19
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New Member
Join Date: Jan 2020
Location: Three Rivers
Posts: 1
M.O.C. #25731
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My head hurts, Learning curve 12v wiring
Ok so I have invested in a Used 2005 Keystone montana. I am replacing most of the large appliances. I am having an issue with a good amount of the 12v wiring. All of the 12v lights in the dinning/Living room slide out, the 12v lights(wall scounces)in main area do not seem to be getting voltage. All circuits are hot coming from main fuse block. I am needing to find direction to run down open in circuit.
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01-31-2020, 01:44 PM
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#20
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Montana Master
Join Date: May 2019
Location: Alton
Posts: 2,747
M.O.C. #24086
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There is a couple of articles in here about troubleshooting 12v electrical systems.
https://www.rvtravel.com/category/rv...ty-newsletter/
Hope this helps.
__________________
Daryl and Marianne,
2019 3130re 20th Anniversary Edition
2016 F350 Lariat
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