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Old 09-07-2019, 11:08 AM   #1
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Battery disconnect switch

Anyone ever had that switch fail to disconnect?

'99 T-1950.

Used it on shore power last weekend, then disconnected the AC and buttoned everything up; left it at the campsite. The disconnect switch was in the Off position. Today I went to hitch up and bring it home, and found the gas detector energized and the radio's LCD clock display lit up.

Turned the disconnect to On for the drive home, then turned it off while unhitching. Everything's now as it should be, with nothing lit up in the camper. I put a meter on the switch and cycled it a dozen times, and it works as it should.

Scratching my head...
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Old 09-07-2019, 12:16 PM   #2
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I don't have one but I need to add one so I am following.....
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Old 09-07-2019, 03:49 PM   #3
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I assume this is on the battery?
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Old 09-07-2019, 04:42 PM   #4
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It's on the frame to the rear of the battery. Looks to be OEM.
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File Type: jpg swx2.jpg (65.4 KB, 12 views)
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Old 09-07-2019, 05:57 PM   #5
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As FYI

Sunline did not install a battery disconnect switch on the travel trailers until the 2004 model year and newer. Was told it was part of the 2004 design upgrades.

I do admit who ever mounted yours, did a good job. Can not speak for the brand you have. I’ll have to look up the Sunline provided brand. Have not had one not work for me yet. But they may be newer then yours.
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Old 09-07-2019, 06:25 PM   #6
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Interesting; thanks John. Now that I think about it, the red cable sheathing is probably a giveaway that it's not OEM wiring. It also seemed a bit odd to me that it disconnects the breakaway switch as well as everything else, but I don't know if that's typical. Seems like the breakaway should always be hot.

I'll just keep an eye on it, and plan on replacing the switch if the situation recurs.
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Old 09-07-2019, 07:35 PM   #7
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I have to say I would have thought it OEM..very nice install by whomever..
Gives me ideas on how to install a battery cutout..
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Old 09-07-2019, 08:18 PM   #8
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On the Sunline original installs, the emergency breakaway switch is wired hot (live) all the time. It taps in on the upstream lug of the battery disconnect switch. Safer setup that way in case someone forgets to turn on the battery when towing.
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Old 09-07-2019, 08:56 PM   #9
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Quote:
Originally Posted by JohnB View Post
On the Sunline original installs, the emergency breakaway switch is wired hot (live) all the time. It taps in on the upstream lug of the battery disconnect switch. Safer setup that way in case someone forgets to turn on the battery when towing.
My breakaway is wired through a seperate fuse, wired directly to the battery. My '07 has a factory installed disconnect. As far as I know my trailer was the last custom built trailer Sunline delivered, so they had the disconnects until they went under.
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Old 09-08-2019, 07:15 AM   #10
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Standard rally race car disconnect. The brake safety wire should not be fused you really want it to work no matter what.
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Old 09-08-2019, 07:55 AM   #11
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My ebrake is direct wired and unfused.
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Old 09-08-2019, 08:15 AM   #12
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My ebrake is direct wired and unfused.
You are correct.

My bad, the brake is wired direct, the jack is fused off the battery.
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Old Yesterday, 10:19 AM   #13
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Battery feeding the system?
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Old Yesterday, 05:28 PM   #14
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I had a '97 T1950. It did not have a disconnect switch and the e-brake had it's own unfused hot wire direct to the battery. My current '07 195SR has a disconnect switch but looks nothing like yours. You might want to check and see if it can be disassembled to see if a contact got bent.
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