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Old 08-27-2012, 06:25 PM   #1
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Battery Disconnect won't come on

Went to turn on power in the trailer. Pushed "Use" on battery disconnect panel. Light comes on but as soon as I release the button it goes out. 12.5 volts on each battery. We were going out tomorrow to a place with full hookups. Can I still hookup to the 30 amp service without hurting anything?
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Old 08-27-2012, 06:53 PM   #2
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Sounds like a bad relay.
As far as using the trailer, try plugging it in to 120 v, and see if the 12v stuff comes on.
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Old 08-27-2012, 07:02 PM   #3
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You should be fine when plugged into shore power. The converter should deliver 120v and 12v power to the rig.

Like Terry said, plug your shore power cord into a regular 120v outlet (you'll need an adapter)...everything should work, including the 12v DC systems and the 120v AC systems...but not the air conditioner and possibly not a microwave (if you have one).
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Old 08-27-2012, 07:55 PM   #4
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Originally Posted by Woosch View Post
Went to turn on power in the trailer. Pushed "Use" on battery disconnect panel. Light comes on but as soon as I release the button it goes out. 12.5 volts on each battery. We were going out tomorrow to a place with full hookups. Can I still hookup to the 30 amp service without hurting anything?
I sounds to me like the switch is mechanically faulty. Is there any way you can tape it or otherwise force it to stay in the pushed in position?
Keep in mind that I've never seen one of these switches.

Ken
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Old 08-27-2012, 08:02 PM   #5
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Originally Posted by Woosch View Post
Went to turn on power in the trailer. Pushed "Use" on battery disconnect panel. Light comes on but as soon as I release the button it goes out. 12.5 volts on each battery. We were going out tomorrow to a place with full hookups. Can I still hookup to the 30 amp service without hurting anything?
John,

Locate the battery solenoid first. They are usually up front near all of your DC wiring busses, close to the batteries, in the same area where your trailer umbilical connects to the trailer wiring. See if the solenoid has any fuses on it (some do) and check them. You may have a bad fuse that is not allowing the solenoid to 'latch' or engage when the switch is in the 'use' position. Airstream uses latching solenoids for the battery disconnects. This is why your momentary battery position switch either opens the solenoid (store) or closes it (use). The light should be on whenever you are in the 'use' position OR whenever you are connected to shore power.

Also, if you DO have a bad solenoid, you will not get any charging to your batteries, even when plugged in to shore power. All of your DC circuits will be energized by your converter, but no charging amperage will flow thru a solenoid that is open.

There is a simple work-around for this if you find the problem. PM me for more detailed trouble-shooting information.
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Old 08-28-2012, 09:50 AM   #6
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Thanks for all the advice. I really need to hunker down and get a better handle on how the electrical system works/ I will let you all know how it turns out.
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Old 08-28-2012, 10:36 AM   #7
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Our trailer did same. Next campground we plugged into, it "Worked". Has been fine since.
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Old 08-29-2012, 10:21 PM   #8
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knunut- Everything seemed fine last night but back to square one after coming off shore power. Checking for fuses on solenoid per Lewsters recommendation. Frustrating. Thanks.
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Old 09-05-2012, 11:38 AM   #9
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It was a bad switch after all. Kind of suspected it because it was having a harder and harder time catching over the last six months. Thanks.
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Old 01-01-2013, 11:34 PM   #10
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Battery Disconnect Switch Light

I have a question about the battery disconnect switch? I want to be able to place the switch in the "store" position when plugged-into shore power for long periods of time to keep my new AGM batteries from being overcharged. But if I remember correctly, the red light on the disconnect switch stays on while connected to shore power even if I toggle the switch to the "store" position. Am I correct that the red light stays on (even in the "store" position) when plugged into shore power, and if so, how do I know for sure that the batteries are really disconnected and will not overcharge?
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