Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 02-11-2012, 09:59 AM   #1
Junior Member
Join Date: Nov 2011
Posts: 6
Battery Problem

I have charged my battery to start my motorhome several times and it keeps on losing a charge after two days. I took it in and they replaced both coach batteries and I thought that would take care of the problem. But I still lose the charge in my chassis battery after about two days. Any trouble shooting you would suggest to try and fix the problem of what is draining the battery?

bounder50 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 02-11-2012, 10:11 AM   #2
Senior Member
Jim_HiTek's Avatar
Join Date: Nov 2011
Location: Full time RV'er
Posts: 1,760
All your batteries have parasitic loads which all of us have found various ways to work around. Your coach will have a set of switches that remove some, but not all, of them. Safety devices, like your LP leak detector, the radio memory, etc. will still be powered. The small roof mounted solar panel helps a little but don't depend on it.

What most of us do it to try to keep it plugged into AC when it's parked. And add a small charger for the chassis (starting) batteries to keep them topped off. The inverter keeps the house batteries topped but generally not the chassis battery.

If you can't do that, then the best course of action is to remove the ground leads after the batteries are fully charged.

'02 Winnebago Journey DL, DSDP, 36' of fun.

Visit my RV Travel & Repair Blog at : http://chaos.goblinbox.com
Jim_HiTek is offline   Reply With Quote
Old 02-11-2012, 10:16 AM   #3
Registered User
Fleetwood Owners Club
Freightliner Owners Club
Join Date: May 2011
Location: Silicon Valley, CA
Posts: 1,857

The most likely answer is that something was left on. Do you have one or two battery cut-off switches? Were they off?

If you can disconnect the batteries momentarily do you get a big spark when you reconnect? Expect to get a small one as there is always 'some' current draw. By some I mean around 200-600 milliamps. That's about what it takes to maintain time and station memory on the radio.


Antenna Amplifier?

12V Lights? (Inside cabinets, closets, etc.)

Propane detector?

C02 detector?

If you have an ammeter hook it up and start pulling fuses. If you pull a fuse and the current draw drops a bunch that circuit is the culprit. Or one of the culprits.

If you don't have an ammeter pull the fuses and look for the ones that throw the biggest spark when reconnected. Most of them should not throw any spark. Radio and propane/C02 detectors are most likely always drawing current.

Good Luck!
Muddypaws is offline   Reply With Quote
Old 02-11-2012, 11:37 AM   #4
Senior Member
GaryKD's Avatar
Newmar Owners Club
Join Date: Jul 2006
Location: Wellington, Florida
Posts: 12,533
Hi bounder50,
Welcome to iRV2. Your question may be specific to your brand and model. Consider posting your question in the Fleetwood Owners Forum. On the iRV2 main page, scroll down about 1/2 way. You'll see all the owners forums sorted by brand. I suggest this because nobody knows your coach like somebody who owns one just like yours.

Having a chassis battery run down after two days requires quite a draw. I know you mentioned you took it in; but I am confused as to why the shop would think the coach batteries would solve the problem with your chassis battery. For me, I'd take the chassis battery(s) to a auto parts store or a battery shop. Make sure the battery(s) are fully charged. Let them test for load. They can tell you if the battery(s) are good or not. If the test says they are good, then one must track down the draw. That can be done by following the previous post(s) instructions.
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
GaryKD is offline   Reply With Quote
Old 02-12-2012, 08:28 AM   #5
Join Date: Jun 2011
Posts: 38
If the isolation diode fails in the alternator there can be massive draw on the chassis batteries. This diode is built into the alternator and can fail if batteries are boosted, charged (even momentarily) or hooked up (even momentarily) with reversed polarity. The cure is to have the alternator rebuilt.
DieselOne is offline   Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Battery problem cfing Class A Motorhome Discussions 8 12-31-2011 12:17 PM
Battery disconnect problem Brigadoon Newmar Owner's Forum 10 04-13-2009 10:17 AM
2005 DolphinLX battery problem. KentM National RV Owner's Forum 11 11-21-2007 06:59 AM
12v House Battery Problem ---Solar Panel??? Belgique Winnebago Industries Owner's Forum 6 11-06-2006 07:52 AM
Solved my engine battery drain problem. Bo MH-General Discussions & Problems 6 09-27-2005 05:01 PM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 01:26 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.