LI5er
Long Island
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Joined: 08/10/2008
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I changed the two deep cell batteries in my fifth wheel. Now when I turn the lights on they burn very bright and turn off after 30-60 seconds. Also the fan on the exhaust hood runs at twice the speed as normal. It's as if there's too much power now. Any thoughts on why this might be would be greatly appreciated.
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pulsar
Lewisville, NC
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Joined: 12/30/2001
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Moved from Technology Corner to Tech Issues.
2002 Adventurer 32V - Workhorse chassis
1998 CRV toad - manual transmission
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rockylarson
Jersey Shore
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Joined: 12/25/2007
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Sounds like you are running 24 volts instead of 12. Can't be sure without knowing what you had and what you replaced it with. Chances are you had two 6 volt batteries connected in series (makes 12 volts) and installed two new 12 volt batteries the same way (makes 24volts) that needed to be connected in parallel. If so, leave the positive from one battery connected to the RV, and the negative from the other battery connected to ground but, the connections between the batteries should be positive to positive and negative to negative.
With any luck your fuses will have protected all your circuits.
Good Luck.
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Hit The Road Jack
Treasure Coast of Florida
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Joined: 10/20/2005
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rockylarson wrote:Sounds like you are running 24 volts instead of 12. Can't be sure without knowing what you had and what you replaced it with. Chances are you had two 6 volt batteries connected in series (makes 12 volts) and installed two new 12 volt batteries the same way (makes 24volts) that needed to be connected in parallel. If so, leave the positive from one battery connected to the RV, and the negative from the other battery connected to ground but, the connections between the batteries should be positive to positive and negative to negative.
With any luck your fuses will have protected all your circuits.
Good Luck.
I believe you nailed it my friend!
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Bob & Arlene
DOMICILE Seaford, Delaware
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Joined: 07/20/2006
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8 volt golf cart batteries act that way too.
SKP member
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LI5er
Long Island
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rockylarson wrote:Sounds like you are running 24 volts instead of 12. Can't be sure without knowing what you had and what you replaced it with. Chances are you had two 6 volt batteries connected in series (makes 12 volts) and installed two new 12 volt batteries the same way (makes 24volts) that needed to be connected in parallel. If so, leave the positive from one battery connected to the RV, and the negative from the other battery connected to ground but, the connections between the batteries should be positive to positive and negative to negative.
With any luck your fuses will have protected all your circuits.
Good Luck.
Yep, thats it. Thanks a million. The circuits are O.K. Just need to change a few light bulbs.
I connected the positive cable to one battery and the ground to the negative on the other battery with a jumper to link the two negatives. Do I also need a jumper to link the two positives. It works the way I have it now but I'm not sure about that positive jumper.
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david_42
Oregon
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Joined: 04/08/2005
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Yes, connect the two positives. Otherwise, you are only using one of the batteries.
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RJsfishin
Winston Or.
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If everything is ok except a few lite bulbs, don't ever say you don't have good luck on your side !
Rich
'98 Flair, 454, Onan Microlite 4k, Intel PD 9155 w/ wizard, Sta-power 1500 watt Inv, 2 6v batts, ammeters, KingDome/sat, Oly Catalytic Heat, hauling 2 Bent Bikes and sometimes towing a Tracker F&S boat.
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tvman44
Southwest Louisiana
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Joined: 09/25/2007
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Sounds like you put them in series instead of parallel. 24 Volts instead of 12 volts. 
Papa Bob
1* DW "Granny"
1* 2008 Brookside Sunnybrook 32'
1* 2002 F250 Super Duty 7.3L PSD
Husky 16K hitch, Tekonsha P3,
Firestone Ride Rite Air Springs, Trailair Equa-Flex, Champion C46540
"A bad day camping is better than a good day at work!"
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rockylarson
Jersey Shore
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david_42 wrote:Yes, connect the two positives. Otherwise, you are only using one of the batteries.
Yes.
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