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01-02-2012, 07:03 AM
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#1
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Senior Member
Workhorse Chassis Owner
Join Date: Aug 2002
Location: Titusville, N.J.
Posts: 148
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Battery Help
Have a 2004 Winnebago Adventurer 38G. I have been keeping a close watch on house batteries while not being used. After being plugged in for a couple of days and bringing house batteries up to full charge, I unplugged coach and turned off the house batteries. I checked batteries 2 - 3 days later and they are still almost fully charged. Still unplugged, I turned house batteries back on, after 3 days, batteries are down below 8 volts which makes me suspect something is draining the batteries. I have checked everything and can not find anything left on. Any suggestions, or could it just be the cold weather
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J Stemler
2004 Adventurer 38G
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01-02-2012, 07:11 AM
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#2
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Senior Member
Join Date: Aug 2008
Location: Georgia
Posts: 8,638
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Do you have a inverter,smoke detector,propane detector maybe a bay light on. If the batteries are original to the coach and you let them get below 8 volts it probably want take much to kill them. Dead batteries and freezing weather you have a good chance a need to replace them.
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2007 Fleetwood Revolution LE 40V
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01-02-2012, 07:12 AM
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#3
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Member
Fleetwood Owners Club Solo Rvers Club
Join Date: Feb 2010
Posts: 94
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Perhaps an inverter (12 to 120 volt) is still on?
An AMP meter would give a clue what amount is pulled from your batteries.
Cold weather would only influence the capacity of the batteries, when no current goes they stay "full".
Gerard.
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01-02-2012, 07:18 AM
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#4
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Senior Member
Workhorse Chassis Owner
Join Date: Aug 2002
Location: Titusville, N.J.
Posts: 148
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Checked all bay lights, nothing left on, do have a propane detector running, inverter is off. Where should I connect my amp meter to check for draw?
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J Stemler
2004 Adventurer 38G
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01-02-2012, 07:24 AM
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#5
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Member
Fleetwood Owners Club Solo Rvers Club
Join Date: Feb 2010
Posts: 94
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If you disconnected your batteries, I take it you disconnected the ground wire to the batteries.
Again, disconnect it and keep the meter, minus to ground and plus to negative pole (or the disconnected wire if that is the end you disconnected from the pole....).
When it is very cold (0 F) the batteries have a low capacity and run empty quite fast. But measuring is the "proof of the pudding".
Gerard.
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01-02-2012, 07:29 AM
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#6
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Senior Member
Freightliner Owners Club
Join Date: Dec 2011
Posts: 240
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If not using your Motorhome shut off the main and house batteries and if u live in a cold climate pull out your house batteries and put them on a battery tender and in the spring u will be all set to go. I have done this since my first year was a disaster. My 4 house batteries exploded. It was a costly mistake.
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01-02-2012, 07:32 AM
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#7
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Senior Member
Workhorse Chassis Owner
Join Date: Aug 2002
Location: Titusville, N.J.
Posts: 148
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Gerald, I just use my battery disconnect switch to turn batteries off, leads are still connected, so I would just attach amp meter leads to battery post, correct ?
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J Stemler
2004 Adventurer 38G
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01-02-2012, 07:37 AM
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#8
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Member
Fleetwood Owners Club Solo Rvers Club
Join Date: Feb 2010
Posts: 94
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Yes, disconnect the wire going from the chassis to the battery(ies) at the negative pole. (Safest as no wire can make a short then).
Then a meter (10 amps minimum reading capacity) between the wire and the pole and you see the current that is drawn.
If it is between 500Ma and an Amp, it could be a control panel that is using the current and with the cold empty your batteries quickly....
My Tioga is in Wassila AK and I remove all batteries and safe them in my frends garage on a trickle charger..
Gerard.
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01-02-2012, 07:50 AM
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#9
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Senior Member
Join Date: Jun 2009
Posts: 1,528
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Not sure I understand what your question is
You said:
Quote:
After being plugged in for a couple of days and bringing house batteries up to full charge, I unplugged coach and turned off the house batteries. I checked batteries 2 - 3 days later and they are still almost fully charged.
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That sounds like the battery disconnect is doing what it is supposed to do in the OFF position.
Then you said:
Quote:
Still unplugged, I turned house batteries back on, after 3 days, batteries are down below 8 volts which makes me suspect something is draining the batteries.
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Things like the fridge, monitor circuits, inverter in cockpit overhead, etc. will be drawing power with Battery Disconnect in ON position. So why would you expect the battery to not be drained?
Dave
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01-02-2012, 09:21 AM
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#10
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Senior Member
Workhorse Chassis Owner
Join Date: Aug 2002
Location: Titusville, N.J.
Posts: 148
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Dave, my question is, with the battery disconnect switch on, coach not plugged in, evderything I can think of turned off, fridge, all lights, inverter, vehicle radio, all bay lights off. The only thing I still see running is the propane detector, my batteries down down in 2-3 days, is this normal in cold weather, or is there still something running that is draining batteries that I need to look for. Just trying to make sure our first dry camping trip is not spolied by dead batteries in the morning.
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J Stemler
2004 Adventurer 38G
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01-02-2012, 09:30 AM
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#11
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Senior Member
Join Date: Jan 2011
Location: Pensacola, FL
Posts: 2,457
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Just to be clear:
Do you have 2 battery disconnects? One for the "House" batteries and the other for the "Chassis/Engine" batteries.
If so, are you turning both of them off?
Also, how did you determine that your batteries were fully charged?
Lastly, are they the original batteries?
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2008 Itasca 37H
2011 & 2012 Len & Pat's "One lap of America"
27K miles & 41 states in 13 months
Yellowstone Lake 6-1-2012
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01-02-2012, 09:32 AM
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#12
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Senior Member
Join Date: Jun 2009
Posts: 1,528
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Then you are basically trying to perform an inventory of your coach. Here is a link to a video that describes how to isolate parasitic loads: http://www.irv2.com/forums/f54/solar...ml#post1007549.
Don't forget you monitor circuits (tanks, ESM, etc.) are also drawing power.
Dave
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01-02-2012, 09:37 AM
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#13
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Senior Member
Join Date: Jun 2009
Posts: 1,528
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Not sure if you need it, but here are the wiring diagrams for your coach: Table of Contents
Dave
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01-02-2012, 09:51 AM
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#14
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Senior Member
Workhorse Chassis Owner
Join Date: Aug 2002
Location: Titusville, N.J.
Posts: 148
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Dave, only 1 disconnect, house batteries. Use my onboard EMS to check battery voltage. Not certain, bought coach used, suspect they are not original batteries. Last dry camped in Oct. did not have any battery issues, plenty of voltage after sitting all night. Just thought batteries dropping to 8 volts in 2-3 days might be a problem
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J Stemler
2004 Adventurer 38G
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