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Old 02-22-2011, 07:27 PM   #1
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Master battery cut-off switch

I can't find a master battery cut-off switch in my shiny new Jayco 28.5RLS fifth wheel, nor any mention of it in the documentation. Does Jayco just not install a master battery cut-off switch in some trailers, or is the switch hiding somewhere?
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Old 02-22-2011, 07:28 PM   #2
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Mine didn't have one, and I haven't seen any in new ones, either. It's a simple addition, and a trip to the local boat shop like West Marine will get you a good quality Perko switch for about $35.
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Old 02-22-2011, 07:45 PM   #3
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I had to install one also:


https://www.jaycoowners.com/attachmen...1&d=1296177752
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Old 02-22-2011, 07:53 PM   #4
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Thanks, guys. It sure is dumb of Jayco to make a trailer without a master switch. But you are right, it's an easy fix.

By the way, if I run according to pattern, this was the first of 872 questions. Get ready!!
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Old 02-22-2011, 08:04 PM   #5
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I just remove the 30 amp automotive fuse that's next to the battery box.
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Old 02-22-2011, 09:15 PM   #6
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.

At my 2006 Jayco at our seasonal site, I installed a manual 12V switch as well. For my setup, I used a hard wood board backing. Could have used a steel plate as well. For picture, surf: http://i178.photobucket.com/albums/w...e/100_1336.jpg

Note: If installing a manual 12V switch, it might be best to install on the "+" cable (near the battery). And, have the brake's break-away positvie cable on the "live side" of this switch. Using this wiring connection method, the brake's break-away switch will continue to work - regardless of manual switch position. If wanting to build a 100% off or 100% on manual switch, install this optional switch on the "+" or "-" side of the battery. And all other cables are connected to the switch side (of the switch).

Hope this helps as well.

.
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Old 02-22-2011, 09:27 PM   #7
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No master switch on my Eagle...

But don't want one. I just keep the shore power hooked up and check the batteries every month. So far zero issues.

But do remember even though you have a master switch on the battery doesn't mean it will protect them from self-discharge.

Like I use to work for the local fire dept. They always had issues with dead batteries in the fire trucks even with master switches. What it can down to was installing a small trickle charger in the trucks and keeping them plugged in. So this just proves that master switch will keep your loads from drawing down the batteries but does nothing about the self-discharge.
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Old 02-23-2011, 09:31 PM   #8
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I am with you MoparMan, I don't have one and don't really see any need for one. Our trailer is always plugged in.
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Old 02-24-2011, 06:39 AM   #9
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But if you`re not plugged in and do not disconnect the battery it will be stone dead in about two weeks, due to the parasitic draws from LP/Carbon monoxide alarm, radio, etc. I found this out the hard way on my first trailer. -Lee
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Old 02-24-2011, 09:09 AM   #10
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I just pull the ground cable off of the battery when leaving the trailer in storage. Takes about 10 seconds longer than turning a switch, and it's free!
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