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Old 07-13-2013, 08:42 AM   #1
Fleetwood Owners Club
Freightliner Owners Club
Join Date: Jun 2009
Location: North Carolina
Posts: 50
Need electrical advice

We are located in cg in Rapid City, SD. Last night we noticed a rotten egg smell. The smell was so strong that the security person noticed and came over to see if I had a sewer leak.

I went outside and noticed that one of the chassis batteries was boiling and putting out the odor. I shut the Invertor/charger down to stop the charging.

Yesterday morning I changed out the house batteries. When we returned from touring I noticed that the voltage of the chassis batteries was down to around 6 volts. After talking to some people and observing a battery setup similar to mine I had a cable that should have gone to ground attached to positive side. After moving the cable all the batteries charged up to normal. Later on is when we noticed the battery problem.

Do you think that I should replace the chassis battery that was boiling. Thanks

Ron Patterson
2003 Discover 39L

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Old 07-13-2013, 09:00 AM   #2
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Originally Posted by RonPatt View Post

Do you think that I should replace the chassis battery that was boiling. Thanks

Ron Patterson
2003 Discover 39L
Must be something about Rapid City, had the same thing happen to me with the truck batteries on the way there two years ago. I had a cell go bad on one of my dual batteries, and the alternator keep charging the other battery until it boiled it over and ruined it. Long story short, I had to replace both batteries.

2007 K-Z 35 Toyhauler, 2006 Chev 2500HD Duramax, 2005 H-D Road King Classic, 2007 Mini-Schnauzer "Scooter"
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Old 07-13-2013, 09:34 AM   #3
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I would say your chassis battery are toast boiling is not a good sign.
2 stroker
2006 Country Coach Inspire 360 40ft Genoa Designer Series, Samsung 197 RR
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Old 07-13-2013, 09:38 AM   #4
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Location: Jonesboro, AR
Posts: 78
When a battery boils it overheats and buckles the plates inside. The battery may hold a charge but will not completely recover.
2000 38' DSDP, Spartan chassis, 2015 Dodge Dart Toad, Blue Ox tow bar, 330 HP Cummins, Ready Brake, Trucenter
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Old 07-13-2013, 09:47 AM   #5
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Appalachian Campers
Join Date: Sep 2002
Location: Dixie !! (north Georgia) USA
Posts: 2,838
I had the same problem, except it was just an older battery that started gassing. I replaced them both. Did not want an older battery causing the new one to go bad. Replaced with Freightliners from the area shop. want no problems that far from home and try to patch my way home
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Old 07-13-2013, 12:37 PM   #6
Fleetwood Owners Club
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Thanks for the confirmation. Just got back from Interstate with 2 fresh chassis batteries. Things are humming now.

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Old 07-15-2013, 10:20 AM   #7
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Damon Owners Club
Join Date: Jun 2013
Location: Arizona
Posts: 143
We had a similar issue with our coach batteries. It turned out to be the "On Board" 55 amp, power supply float charger. It was replaced, along with two new coach barrety's, solved the problem.

Apparently, the original on board charger unit had a component failure and would continue to charge the coach batteries at a high amperage rate over charging them. This over charging caused the batteries to boil off water in the cells...

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