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06-10-2013, 09:04 AM
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#1
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Established Member
Join Date: Aug 2012
Location: Mt. Vernon
Posts: 46
M.O.C. #12805
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Power Converter
2008 Montana 3400RL.
I found the converter under the stairs. It seems to be functional. If I unplug it the refrigerator and water pump will go off. It is not charging the battery though. Pulling only a 12.69 reading at the battery.
I was told to check the fuse on the converter first. Does anyone know where it is? Inside the converter or on the IOTA fuse panel?
I was given a quote by the dealership to replace the converter. Around $600.00, which seemed high to me.
Any information or guidance would be appreciated.
New to this site so don't have a profile signature yet.
Full timers, love the Montana 3400RL because it fits our home/work needs, pulling with a Ford 2006 350 diesel.
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06-10-2013, 10:11 AM
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#2
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Montana Fan
Join Date: Jan 2010
Location: Littleton
Posts: 183
M.O.C. #9998
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Sound like maybe your battery disconnect switch in your convenience center is turned off, isolating your battery from the coach and converter.
__________________
2010 Mountaineer 285 RLD, 330 watts solar, 600 watts sine inverter, 3 type 31 agm batteries, Traveler antenna
2010 Dodge Ram 3500 SRW, 18k Reese slider, Honda 2000i, Firestone airbags
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06-10-2013, 10:24 AM
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#3
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Montana Master
Join Date: Oct 2012
Location: Chilliwack
Posts: 1,520
M.O.C. #12935
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It would be most helpful to know the make and model of the converter. The water pump and fridge both need 12V to operate, if you unplug the converter and these do not work, then I would say it is working and producing 12V, there may be a poor connection from the converter to the battery or one of the battery terminals themselves, possible the ground.
The way you have stated your problem leads me to believe the battery and converter are not somehow connected at the moment. Check the voltage at the converter with the one of the battery terminals disconnected. It should be in the area of 13.4V
The price seems pretty high for basically a plug in converter that would only need the DC side re-connected.
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06-10-2013, 10:28 AM
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#4
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Montana Master
Join Date: Oct 2012
Location: Chilliwack
Posts: 1,520
M.O.C. #12935
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2wanderers might have hit on the problem, since I never use my 12V disconnect I don't think about it. Check it first.
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06-10-2013, 10:34 AM
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#5
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Established Member
Join Date: Aug 2012
Location: Mt. Vernon
Posts: 46
M.O.C. #12805
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I checked the battery disconnect switch and it was in the OFF mode. I swear it has been since we bought this RV in August. I switched it to the ON mode and it is now getting a 13.19 reading.
The battery that came with the RV 'popped it's top' about two weeks ago and I replaced it with a new one. I can double check all the connections.
The battery disconnect switch is supposed to be in the ON mode? That sounds like the mode it should be in if you want the battery disconnected.
Thanks for replies and any other information that can be offered.
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06-10-2013, 10:48 AM
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#6
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Established Member
Join Date: Aug 2012
Location: Mt. Vernon
Posts: 46
M.O.C. #12805
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Now getting a 13.62 reading. Sounds like the battery disconnect switch might have been the problem. Ultimate test will be if the refrigerator switches to propane and stays on when shore power is disconnected.
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06-10-2013, 11:48 AM
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#7
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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The on/off refers to whether the power is flowing or not. It's confusing and if you look back some years you'll find my panicked thread on here when I couldn't get 12v stuff to work. That's what the forum is for. Have a great time in your Monty!
__________________
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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06-10-2013, 12:28 PM
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#8
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Montana Master
Join Date: Jan 2013
Location: Bridgewater
Posts: 1,196
M.O.C. #13166
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Yes it is confusing. The switch is called the "battery disconnect", so in the "on" position, the battery should be disconnected, right? Wrong. The battery is disconnected when the disconnect switch is "off". I double-check by trying the exterior light on the front of the camper (shore power unplugged).
__________________
2010 Montana 3455SA, Mor/Ryde pin, wet bolts, TST 507, Progressive HW50C, GY G614
2019 Silverado D/A 3500HD LTZ DRW CC
B&W Companion
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06-10-2013, 02:47 PM
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#9
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Montana Master
Join Date: Feb 2007
Location: Winfield
Posts: 7,327
M.O.C. #6846
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Quote:
quote:Originally posted by DQDick
The on/off refers to whether the power is flowing or not. It's confusing and if you look back some years you'll find my panicked thread on here when I couldn't get 12v stuff to work. That's what the forum is for. Have a great time in your Monty!
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That depends on who the Amish electrician was that day. That is the primary reason that I use the convenience center light to tell me whether the disconnect is connected or disconnected!! That and the fact that I am always confused and a light on and off is a lot easier to see than remembering what the on does and what the off does. It still seems backwards to me!!
Bingo
__________________
Bingo and Cathy - Our adventures begin in the hills of WV. We are blessed by our 2014 3850FL Big Sky (previous 2011 3750FL and 2007 3400RL) that we pull with a 2007 Chevy Silverado Classic DRW CC dually.
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06-10-2013, 02:53 PM
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#10
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Seasoned Camper
Join Date: Dec 2012
Location: Pasco
Posts: 91
M.O.C. #13075
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Where is the battery disconnect switch in 3750FL
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06-10-2013, 02:59 PM
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#11
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Montana Master
Join Date: Jun 2010
Location: Colorado Springs
Posts: 3,335
M.O.C. #10496
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Just an idea.... If you were handy, a small 12V LED indicator light wired to the switch would tell you for sure every time!!
__________________
2010 3150RL
LevelUp, Dual 6 volt batteries, Progressive Industries EMS HW50C, Honda EU2000i Generator, Bridgestone Duravis R250 tires, Torklift Glowstep Revolution Stairs, LED Tail lights
2015 RAM 3500 Laramie SRW LB CC Cummins 6.7L Aisin Trans B&W RVK3600
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06-10-2013, 03:05 PM
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#12
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Montana Master
Join Date: Oct 2011
Location: Lykens
Posts: 545
M.O.C. #11842
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Quote:
quote:Originally posted by Big Dave
Where is the battery disconnect switch in 3750FL
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Mine is in the convenience center. Red handle.
There is a 12 volt light in the convenience center, so if your not plugged in to AC you can determine the function of the switch by observing the light when you operate the disconnect.
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06-10-2013, 03:16 PM
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#13
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Montana Master
Join Date: Oct 2009
Location: Indian Land
Posts: 1,142
M.O.C. #9808
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Easy way to tell is if you can remove the key, the power isn't flowing. If the key doesn't come out you are good to go.
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01-02-2019, 02:48 PM
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#14
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Established Member
Join Date: Nov 2015
Location: Damascus
Posts: 17
M.O.C. #18068
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Power converter on 2017 3721 RL
I am looking for the power converter on my 2017 3721RL. My batteries will not stay charged, both disconnect switches are in the on position
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01-02-2019, 04:00 PM
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#15
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Montana Master
Join Date: Apr 2017
Location: 1000 oaks
Posts: 954
M.O.C. #19630
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Quote:
Originally Posted by cwhite
I am looking for the power converter on my 2017 3721RL. My batteries will not stay charged, both disconnect switches are in the on position
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How do they get charged to begin with?
__________________
2011 2955RL Gen-Y Executive Kingpin
2022 GMC 2500HD Duramax/Alison
4X4 Crew Cab/Standard bed.
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