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Old 02-13-2021, 11:15 AM   #1
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Battery disconnect question

Hello. We have a 2021 Jayco 31MB. It has two batteries and a battery disconnect, but when we use it we notice that some of the lights still stay on and our fridge light stays on. Obviously, these things are connected to the second battery, but isn't the disconnect switch supposed to disconnect both batteries?
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Old 02-13-2021, 11:31 AM   #2
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Originally Posted by FLButler3 View Post
Hello. We have a 2021 Jayco 31MB. It has two batteries and a battery disconnect, but when we use it we notice that some of the lights still stay on and our fridge light stays on. Obviously, these things are connected to the second battery, but isn't the disconnect switch supposed to disconnect both batteries?
Sounds like the dealer connected the batteries wrong since they are the ones who do the install.
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Old 02-13-2021, 12:08 PM   #3
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The only true battery disconnect switch is a 7/16" wrench to physically remove the cables. Many of us have found the hard way that even with a properly installed battery bank, with the disconnect turned off, there remains parasitic drain from the smoke and CO2 detectors and on some rigs the Lippert leveling system.
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Old 02-13-2021, 12:18 PM   #4
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Originally Posted by Joan617 View Post
The only true battery disconnect switch is a 7/16" wrench to physically remove the cables. Many of us have found the hard way that even with a properly installed battery bank, with the disconnect turned off, there remains parasitic drain from the smoke and CO2 detectors and on some rigs the Lippert leveling system.
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Not necessarily, if you do it right. I installed an after-market disconnect switch for my batteries and there is no drain at all — CO2 included.
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Old 02-13-2021, 12:41 PM   #5
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Not necessarily, if you do it right. I installed an after-market disconnect switch for my batteries and there is no drain at all — CO2 included.
Same with my 2015. If the wires are properly connected to the disconnect it kills everything.
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Old 02-13-2021, 01:15 PM   #6
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The battery switch in a lot of the newer units only turn power off to certain items. You can either rewire it behind the panel or add another cut off switch at the batteries(or just disconnect the battery). This is what I plan to do on our new unit. I'm going to mount a cut off switch and circuit breaker in the battery compartment. I'll be posting the project to my site www.rvyourway.com once the snow melts.
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