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01-21-2021, 09:28 AM
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#1
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Established Member
Join Date: Jul 2020
Location: Powhatan
Posts: 13
M.O.C. #26594
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2020 3781 Electrical issues?
Hey Guys - Purchased my 3781 Montana last June - Every time I take it out of storage the batteries are dead. There are two "kill" switches and both are off. The inverter is off so that the refrigerator is not running. There must be something that is directly wired and on. Any ideas? I don't leave the generator on the unit at storage so I have purchased a "jumper box" just to operate the landing gear at hookup. Thanks
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01-21-2021, 09:34 AM
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#2
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Montana Master
Join Date: Apr 2006
Location: Mesa az
Posts: 2,953
M.O.C. #5651
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Many things hard wired on. Propane detector, and other things like this. You have to disconnect the battery or put on a switch and disconnect it that way. People say these other things will drain the battery in 2 weeks or so.
__________________
Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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01-21-2021, 09:41 AM
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#3
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Established Member
Join Date: Jul 2020
Location: Powhatan
Posts: 13
M.O.C. #26594
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Quote:
Originally Posted by twindman
Many things hard wired on. Propane detector, and other things like this. You have to disconnect the battery or put on a switch and disconnect it that way. People say these other things will drain the battery in 2 weeks or so.
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would have thought that since there are two kill switches ( one at the batteries and the other in the compartment that houses the water hookups) that by turning both to the off position that would kill all electrical power in the unit. There are no lights on the propane detector.
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01-21-2021, 10:18 AM
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#4
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Seasoned Camper
Join Date: Apr 2020
Location: Panhandle of Florida
Posts: 99
M.O.C. #26098
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Quote:
Originally Posted by Pace & JoAnn Mimms
would have thought that since there are two kill switches ( one at the batteries and the other in the compartment that houses the water hookups) that by turning both to the off position that would kill all electrical power in the unit. There are no lights on the propane detector.
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How many wires are connected to the positive terminal of the battery ... I'm betting 2. One of them goes to a battery cut-off switch that supplies 12vdc to the inverter, The other wire goes to several circuit breakers and finally to the battery cut-off switch in the water compartment. The water compartment switch does not turn off all 12vdc power to the FW.
Put a battery cut-off switch between the wire that goes to the circuit breakers.
__________________
2020 Montana High Country 295RL
10th Anniversary Edition
2019 Silverado 3500HD, Duramax, LTZ, SRW, CC, 4WD, 8'Bed
Reese M5 - 20K
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01-21-2021, 10:28 AM
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#5
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Established Member
Join Date: Jul 2020
Location: Powhatan
Posts: 13
M.O.C. #26594
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Will do - thanks
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01-21-2021, 10:39 AM
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#6
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Montana Master
Join Date: May 2020
Location: UPLAND
Posts: 1,257
M.O.C. #26190
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Can you hook up a trickle charge while it's in storage?
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2019 Keystone Montana 3560RL, 2020 Chevy 2500 HD, Firestone airbags, Air Lift wireless compressor, Curt gooseneck, 20K Reese Goosebox, TST-507, USMC combat vet & retired LEO. Robert, Anika, Breanna, Dylan (daughter-in-law Stephanie). & our Great Pyrenees Layla
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01-21-2021, 12:08 PM
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#7
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,172
M.O.C. #6433
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If your storage has power, just leave it plugged in.
If not, and it receives any sun then a solar battery charger would probably be enough to keep it charged.
If neither of the above, then add a disconnect at the battery terminal.
There are several wires coming off the auto reset circuit breakers going to different places. But I think the battery disconnect switch in the convenience center only breaks the large one.
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Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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01-21-2021, 02:14 PM
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#8
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Montana Master
Join Date: Dec 2007
Location: Kansas City, Missouri
Posts: 2,707
M.O.C. #7992
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There are parasitic drains on the battery. Just disconnect the negative cable from the battery when placing it in storage. Takes 30 seconds.
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2006 3000RK
2009 Ram 2500
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01-21-2021, 04:33 PM
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#9
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Montana Master
Join Date: May 2019
Location: Alton
Posts: 2,705
M.O.C. #24086
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What Jim said
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Daryl and Marianne,
2019 3130re 20th Anniversary Edition
2016 F350 Lariat
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02-03-2021, 01:15 PM
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#10
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Seasoned Camper
Join Date: Sep 2019
Location: Winona Lake
Posts: 81
M.O.C. #24885
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Also make sure your breakaway cable is not pulled.
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02-03-2021, 01:29 PM
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#11
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Montana Fan
Join Date: Feb 2020
Location: BUZZARDS BAY
Posts: 115
M.O.C. #25753
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I have the same exact unit and yes you need to disconnect the battery or it will go dead in a few weeks. I leave my solar on all winter to keep it topped off.
__________________
2020 Montana 3781RL
2020 GMC 3500 Denali HD Diesel SRW
20k Demco slider hitch
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02-03-2021, 03:40 PM
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#12
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Montana Master
Join Date: Jun 2020
Location: Qualicum Beach
Posts: 665
M.O.C. #26399
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Quote:
Originally Posted by Pace & JoAnn Mimms
Hey Guys - Purchased my 3781 Montana last June - Every time I take it out of storage the batteries are dead. There are two "kill" switches and both are off. The inverter is off so that the refrigerator is not running. There must be something that is directly wired and on. Any ideas? I don't leave the generator on the unit at storage so I have purchased a "jumper box" just to operate the landing gear at hookup. Thanks
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Remove the battery negative cable. The switches do NOT kill all power. BTW, your battery is now toast, good opportunity to buy a real golf cart battery, actually 2 since they are 6V not 12 unless you only use the RV a few weekends a year in which case buy what the dealer sells.
__________________
2018 Keystone Montana 3811MS
2017 Ford F450 diesel dually
600AH Battle Born Lithium Batteries, 1,080 watts solar
3,000 watt hybrid inverter with 120A charger
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04-04-2021, 11:23 AM
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#13
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Established Member
Join Date: Jul 2020
Location: Powhatan
Posts: 13
M.O.C. #26594
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Found the problem - the dealer wired the batteries wrong - had to purchase two new batteries on the road - will take the receipt to dealer next time I am there....
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04-04-2021, 06:13 PM
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#14
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,172
M.O.C. #6433
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Quote:
Originally Posted by Pace & JoAnn Mimms
Found the problem - the dealer wired the batteries wrong - had to purchase two new batteries on the road - will take the receipt to dealer next time I am there....
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Can you describe how it as wrong? That may help someone else someday.
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04-05-2021, 11:55 AM
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#15
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Montana Master
Join Date: Apr 2006
Location: Mesa az
Posts: 2,953
M.O.C. #5651
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Another tidbit - I leave my trailer in storage for 5-7 months with batteries disconnected. I have always had enough power to run slide, raise lower jacks, etc. I do have 2 6V golf cart batteries, so that may help a little.
__________________
Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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