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Old 01-24-2013, 01:08 AM   #1
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12V battery

I was cleaning the trailer and was curious enough to test the battery. I unplugged the source power from the wall and flipped on the lights with nothing turning on.

I pressed the battery test at the control unit and it resulted in very low battery status. Doesn't the controller charge the battery while I am not using it? I have a 2006 Thor Summit.

In this case, if I plug into the truck (brake controller wiring harness), it would charge my battery and allow the brakes on the trailer to work ? The towing harness comes stock from the truck.

Thanks in advance,
tntrac
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Old 01-24-2013, 01:13 AM   #2
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Originally Posted by tntrac View Post
I was cleaning the trailer and was curious enough to test the battery. I unplugged the source power from the wall and flipped on the lights with nothing turning on.

I pressed the battery test at the control unit and it resulted in very low battery status. Doesn't the controller charge the battery while I am not using it? I have a 2006 Thor Summit.

In this case, if I plug into the truck (brake controller wiring harness), it would charge my battery and allow the brakes on the trailer to work ? The towing harness comes stock from the truck.

Thanks in advance,
tntrac
Your converter doesn't seem to be charging.

You've checked all fuses in the control center?

Do the lights work if plugged into short power?

Make and model of converter?
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Old 01-24-2013, 01:24 AM   #3
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Your converter doesn't seem to be charging.

You've checked all fuses in the control center?

Do the lights work if plugged into short power?

Make and model of converter?

Lights work if I plug into shore (wall) power. The name is World Friendship Co. model WF-8935AN. Right now, the battery is in the garage with the tender plus connected.

What I noticed in the past when I plugged in the shore power, I would hear the converter run for 10-20 minutes. I will pay attention to it next time when the battery is connected.


Btw, three months ago, battery was working .
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Old 01-24-2013, 06:58 AM   #4
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There is an open fuse; battery cut off; or corroded terminal between your converter and the battery.

I could point you in the right direction if you had included some information on your camper (5th wheel or travel trailer) either in your signature or your profile..
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Old 01-24-2013, 06:59 AM   #5
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Your converter is working then.

Battery sounds suspect. Or fuse between converter to battery.

Turbs
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Old 01-24-2013, 07:20 AM   #6
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I'm curious, how old is the battery?
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Old 01-24-2013, 02:36 PM   #7
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Your converter is working then.

Battery sounds suspect. Or fuse between converter to battery.

Turbs

Battery looks old. I couldn't find the date stamp. But the fuse looks good. I pulled one fuse out and noticed a red light indicator came on. So there were no lights, etc.

Testing at the control unit of the trailer, it showed the battery to be really low. But when I plugged on the the shore power and tested battery, it shows a decent amount
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Old 01-24-2013, 02:40 PM   #8
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Old batteries can freeze solid because they do not hold their full charge any more. Once discharged the specific gravity of the electrolyte approaches 1 (pure water).
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Old 01-24-2013, 02:53 PM   #9
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In this case, if I plug into the truck (brake controller wiring harness), it would charge my battery and allow the brakes on the trailer to work ?
Yes, the battery should charge from the tow vehicle, and the trailer brakes would work from the tow vehicle battery, but not the trailer battery when stopping normally.

If the trailer battery is dead, then the emergency braking system will not work.
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Old 01-24-2013, 03:00 PM   #10
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Yes, the battery should charge from the tow vehicle, and the trailer brakes would work from the tow vehicle battery, but not the trailer battery when stopping normally.

If the trailer battery is dead, then the emergency braking system will not work.
Thanks so much guys.
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