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11-01-2012, 01:14 AM
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#1
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Montana Fan
Join Date: Sep 2007
Location: rockwall
Posts: 335
M.O.C. #7697
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12V relay?
I put in a new battery, fully charged but I'm not getting any power inside the trailer. Is there a resettable 12V relay that I'm missing? All the fuses seem OK.
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11-01-2012, 01:33 AM
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#2
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Montana Master
Join Date: Nov 2002
Location: Bakersfield
Posts: 5,316
M.O.C. #15
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Trlrboy,
Yes. There should be a relay somewhere inline near the battery. Also don't forget to check the battery disconnect switch. Good luck. Dennis
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11-01-2012, 04:40 AM
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#3
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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What Dennis said. Could be either. For me it was the battery disconnect. Not only is it easy to forget, but the way it's labeled is confusing, at least for me.
__________________
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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11-01-2012, 05:31 AM
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#4
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Montana Master
Join Date: Feb 2007
Location: Winfield
Posts: 7,327
M.O.C. #6846
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It is not just confusing for you Dick, I still think it is labelled backwards. The only reliable check that I have come up with is to turn the DC light on in the convenience center. If it comes on, switch is in proper position! Simple check!
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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11-01-2012, 06:36 AM
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#5
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Montana Master
Join Date: Sep 2006
Location: Kelowna
Posts: 1,475
M.O.C. #6237
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There is a 50 amp breaker that has a lead going back through the hole behind the battery that all your wires come through it feeds the 12 volt panel in the coach. I just replaced mine 2 months ago.
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11-01-2012, 02:01 PM
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#6
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Montana Fan
Join Date: Sep 2007
Location: rockwall
Posts: 335
M.O.C. #7697
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I don't see a breaker anywhere near the battery or where the wires go through the hole.
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11-01-2012, 02:34 PM
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#7
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Montana Master
Join Date: Feb 2007
Location: Winfield
Posts: 7,327
M.O.C. #6846
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It does not look like a breaker, it is an auto-reset breaker that looks like a small silver box on the back wall of the battery compartment. You can disconnect it and/or bypass it to see if it is faulty. Silly question, but you did check the battery disconnect switch, correct?
Bingo
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11-01-2012, 03:29 PM
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#8
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Montana Fan
Join Date: Sep 2007
Location: rockwall
Posts: 335
M.O.C. #7697
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Bingo... thanks for asking about the disconnect. I've tried it both ways and still nothing. I'm going to post a couple of pictures of my battery compartment. No silver box that I can see.
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11-01-2012, 03:45 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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A little different rig (3750) but hopefully this will give you a start on what to look for. If I remember correctly, the two auto-reset breakers are behind the red covers on the back wall:
Hope this helps,
Bingo
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11-01-2012, 03:48 PM
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#10
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Montana Fan
Join Date: Sep 2007
Location: rockwall
Posts: 335
M.O.C. #7697
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11-01-2012, 03:51 PM
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#11
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Montana Master
Join Date: Feb 2007
Location: Winfield
Posts: 7,327
M.O.C. #6846
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See previous post, the red covers are on top of the auto-reset breakers.
Bingo
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11-01-2012, 03:53 PM
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#12
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Montana Fan
Join Date: Sep 2007
Location: rockwall
Posts: 335
M.O.C. #7697
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OK, I pulled off the red covers and there appears to be a relay behind each one with the wires attached. How do these reset?
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11-01-2012, 03:58 PM
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#13
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Montana Master
Join Date: Feb 2007
Location: Winfield
Posts: 7,327
M.O.C. #6846
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They are internal. You can bypass or jumper the breakers to see if they are bad. There are no visible external switches, etc.
Bingo
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11-01-2012, 04:02 PM
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#14
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Montana Fan
Join Date: Sep 2007
Location: rockwall
Posts: 335
M.O.C. #7697
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This is a bit beyond what I think I can do. I don't have any idea how to bypass or jumper the breakers.
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11-01-2012, 04:25 PM
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#15
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Montana Master
Join Date: Feb 2007
Location: Winfield
Posts: 7,327
M.O.C. #6846
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If it is beyond what you think you can do, then time to let the "experts" investigate it. The more I read your posts regarding the 12v and the AC, I am beginning to think that all of this is related somehow to a voltage surge or spike that hit your rig. The EMS has surge protection up to a point, then it becomes sacrificial. A lightning strike nearby, for instance could cause the EMS to bite the dust, it should still protect the rig but that is dependent upon whether the surge was great enough to bypass the EMS system altogether. I am confused as to how this would impact the DC system in the manner in which you have stated unless somehow the converter is involved. You may be correct in your statement to let the dealer troubleshoot this since you do have the extended service plan which should cover all electrical and battery systems. I would be very interested in what they find if you do go that route. This has went beyond my level of limited knowledge. If you want to get more detailed advice, I would suggest you PM Jim Fischer (NCFischers), whom I consider to be our resident electrical guru, (or at least mine ). Sorry I could not help more.
Bingo
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11-02-2012, 02:02 AM
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#16
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Montana Fan
Join Date: Apr 2009
Location: Antioch
Posts: 148
M.O.C. #9267
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The breakers automatically reset a few minutes after they trip. If you are still not getting power through them it might mean that there is a fault somewhere in the system and they tripped again after you replaced the battery. If you have a DC voltmeter, check the voltage going into the breaker ( from the wire coming from the battery) and the wire going out of the breaker to the trailer panel.
If you haven't worked with batteries before please be very careful with any metal tools around the breaker and around the batteries. One of my co-workers managed to have his ring finger bridge two DC voltage terminals in a battery backup UPS on our production line. We saved the chassis with the melted gold splattered on it as a reminder to the production team to be very careful around battery sources.
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