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Old 11-02-2012, 02:57 PM   #1
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89 jayco designer 35' draining batteries in hours

As mentioned i have an 89 jayco designer fifth wheel and something is draining the batteries in a couple of hours.I am not using any of the lights,i am plugged in to shore power.I disconnected the furnace because i thought it would most likely be the fridge or furnace since i am not using any dc lights.With only the fridge it completely drains a brand new walmart evermaxx group 29 battery in 4 hours.I dont think this right and was looking for help in finding the problem.This is the first camper i have ever owned.
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Old 11-02-2012, 03:14 PM   #2
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This is good information here in finding the source:

http://www.rvdoctor.com/2009/12/which-circuit.html

The fridge does pull 12v current for the circuit board but not enough to drain it in 4 hours. If you have a television, even off can draw current. In my old motorhome I had a analog tv but it was switched to cut off power to it. Your propane gas detector/cut off will also draw current.
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Old 11-02-2012, 03:33 PM   #3
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excessive battery drain/electrical problem

I just bought my first camper,an 89 jayco designer fifth wheel.I am hooked to shore power and put in a brand new group 29 battery i bought at walmart.After four hours the battery was dead.I did not use any of the lights and disconnected the wires to the furnace.As far as i can figure the only thing running is the fridge,which says it is on ac on the panel.I had the battery tested and charged,it came back ok,and ran it again and same results,does this seem right?if not how do i track down the problem?thanks
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Old 11-02-2012, 03:35 PM   #4
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I dont have a tv,where is the propane and gas detector?
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Old 11-02-2012, 03:36 PM   #5
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is there a way to tell how much power an item like thecircuit board is drawing?
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Old 11-02-2012, 03:57 PM   #6
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Quote:
Originally Posted by johninhamilton View Post
is there a way to tell how much power an item like thecircuit board is drawing?
Yes, there is.
One approach you can try, is take a multimeter set to measure current, place the probes across one of the distribution panel fuse (or breaker) then pull the fuse or open the breaker. The current for that circuit will now flow through the multimeter. Have the multimeter set to measure at least 10 amps DC. You don't want to exceed the rating of the multimeter. Do this for each circuit to narrow down which circuit is the culprit. Then examine which devices are fed by that branch.
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Old 11-02-2012, 04:07 PM   #7
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Sounds like your converter is not charging your battery when hooked up to shore power. Measure your battery voltage with the camper not plugged in then measure it with it plugged in. With out hooked up you should have 12 volts plugged in to shore power should read 13.5 to 14 volts just like a car.
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Old 11-03-2012, 11:15 AM   #8
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You said you are connected to shore power when this happens?.. you have a direct short somewhere... first guess would be at the converter...
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Old 11-03-2012, 11:54 AM   #9
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Yes Seann could be that, but a short could also be located in one of the branch circuits, like a screw or nail thru some wiring, or insulation which has worn thru at a sharp bend around a chassis part.
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Old 11-03-2012, 03:05 PM   #10
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Sounds crazy, but how about the breakaway cable? Have you checked to ensure that it hasn't been accidentally pulled out?
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