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Old 06-29-2015, 11:19 AM   #11
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The box in your cab controls the amount the brakes are applied, proportional to what you are applying and the setting you have on the controller. The breakaway device has to have it's own battery that will activate the brakes if everything else disconnects from the tow vehicle.
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Old 06-29-2015, 11:35 AM   #12
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You have to have a battery.

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Old 06-29-2015, 12:02 PM   #13
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The thing that usually makes a battery hiss and smoke like that is a over-voltage on the charging system. If you have a volt meter, check the battery voltage when plugged into the shoreline. Your current battery is toast, but you want to make sure your new one doesn't get fried too.

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Old 06-29-2015, 12:03 PM   #14
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Most likely another junk wfco converter.
Progressive dynamics should be your first purchase with a new battery.

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Old 06-29-2015, 12:09 PM   #15
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Thank you guys.
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Old 06-29-2015, 01:16 PM   #16
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Disconnect the battery if you are going to store the RV. A few day's before your going to use it connect it and let it charge back up. Always check the water. And don't read to much in to most "Maintenance free batteries" you can still put water in most.
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Old 06-29-2015, 02:41 PM   #17
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It could easily be a short in the battery...instead of a blown converter. I'd hook up a new batt and take voltage readings at the terminals:
1. Before installing
2. 5-10 min after installing AND plugged into 30amp.
3. 4-5 hours after installing.

Your readings should be
1. 12.6-.7 Volts.
2. 14+ volts...not more than 14.6 or disconnect immediately. You have a converter problem.
3. Between 13.2 and 13.6V ...if higher...get a new converter.

If all the readings are in range, problem solved..keep the water up and don't run em down past 50% discharge. Good luck.
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Old 06-29-2015, 05:22 PM   #18
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Please do not use that battery. Be safe.


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Old 06-29-2015, 09:29 PM   #19
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Some trailers seem to come with a ONE SIZE FITS ALL "CHEAP" converter charger. Upgrading is never bad but at least during storage pull the battery terminal off and put a GOOD HIGH END battery maintainer on it. The best Converter Chargers top the battery 80 % at a higher voltage then drop down a few tenths of a volt to top the batterys off and finally go to a trickle charge or maintainer voltage that should not BOIL the batteries. Then the really good ones have a cycle that periodically soups up the voltage and knocks the sulfur build up off the plates without BOILING them and that evidently helps them last a lot longer
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Old 06-29-2015, 09:40 PM   #20
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Tom. So you don't recommend disconnecting the battery during storage? Just asking. How about mineral oil in the battery to help stop evaporation?
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