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Old 02-21-2013, 05:33 PM   #1
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Battery/electrical

First TT and not had it long. I noticed the battery would drain if I did not use it after 3 weeks of a month. When I disconnected the cables to remove and recharge the battery, I noticed an arc. After recharging and reconnecting the cables, it arced again. Upon checking, I'm getting an ohm reading across the cables. Everything I know of is turned off inside the TT (with the exception of the main breaker) and operates normally when in use. Advice please on what may be draining the battery.
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Old 02-21-2013, 06:32 PM   #2
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Any 12V appliances on such as radio clocks, radio memory?
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Old 02-21-2013, 07:47 PM   #3
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Could be the radio although its turned off. Without testing the ohms, would cutting the main breaker solve the problem or is there a better solution.
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Old 02-21-2013, 08:48 PM   #4
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Hows bout a 12 volt carbon monoxide detector and/ or a smoke alarm. Any lights on in the storage bays? Hook your meter up and go to your 12 volt fuse panel and pull one fuse at a time until you find the problem.
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Old 02-21-2013, 09:55 PM   #5
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Today's radios, TV's, coffee makers, etc have a constant draw on AC voltage. DC voltage side has the same thing for anything in your RV that connects to 12V. For instance, our heat pumps have electronic filter-minders that constantly draw amperage albiet it very small. I once left my CB unit turned on when I parked the truck for a two weeks. Batteries were dead, had to jump-start the truck.

Anyway to your problem. Pull all the 12V fuses in your convertor. Check the battery terminal for that spark, or measure for amp draw. Replace one fuse at a time, and repeat until you find the fused line with the current draw.
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Old 02-22-2013, 07:09 AM   #6
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Thanks folks
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Old 02-22-2013, 04:38 PM   #7
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Turning off the main breaker will not help because the breakers are for the 120 volt side of things. You will have to pull the little 12 volt fuses to stop the draw.
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Old 02-22-2013, 05:05 PM   #8
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Good "battery phantom draw" should get lots of hits and a number of web sites with step by step fix.
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Old 02-22-2013, 08:22 PM   #9
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If you have 120-volt electricity available, then hook up a "battery tender" to the battery.
Battery Tender® Junior 12V @ 0.75A - Batterytender.com

If you don't have electricity handy, then I would disconnect the battery cables from the battery while the RV is in storage. Then be sure to fully slow-charge the battery at least once per month.
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Old 02-22-2013, 09:21 PM   #10
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Your draw is likely coming from a combination of items including smoke/ carbon/ lp detectors, possible radio, tv etc. These may all be normal. You may be able to pull the fuses to eliminate this draw. I've installed a disconnect switch at the battery for when im not using the Rv. Also when my battery is first hooked up I do get a spark as well. Good luck.
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Old 02-22-2013, 09:24 PM   #11
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Quote:
Originally Posted by bt76 View Post
Your draw is likely coming from a combination of items including smoke/ carbon/ lp detectors, possible radio, tv etc. These may all be normal. You may be able to pull the fuses to eliminate this draw. I've installed a disconnect switch at the battery for when im not using the Rv. Also when my battery is first hooked up I do get a spark as well. Good luck.
X2 get you a good battery disconnect and dont look back.
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Old 02-23-2013, 08:01 AM   #12
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Yeah, that will work too. Here's a plain one:
Amazon.com: Blue Sea Systems 6006 m-Series (Mini) Battery Switch Single Circuit ON/OFF: Sports & Outdoors

Regardless of how you disconnect the battery, you still need to plan on charging it once a month or so.
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Old 03-03-2013, 07:00 PM   #13
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I think the battery disconnect is the best option. Disconnecting will also help to prevent electrical fires or battery explosions.
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