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Help with two 12 volt batteries (parallel)?


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#1 Bellbear

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Posted 30 August 2018 - 03:35 AM

So I originally thought I was gonna need to replace my batteries but I charged them and they seem to be holding a charge. I can't remember how they were wired before I took them out (I know, I know). Obviously the ground goes to negative on one battery and the power of camper goes to the positive of other battery. Then there was a small red wire. Does that go from positive on one of the batteries to negative on other battery?
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#2 CougarCouple

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Posted 30 August 2018 - 03:57 AM

Hello bellbear
Do a search on wiring batteries in parallel, or series
This is one I found https://www.batterys...k-tutorial.html

You said a smaller wire that sound strange as the load carrying wires are normally the same guage if your not sure you might want to seek a rv repair center to ask for assistance.it could be very dangerous to short the battery terminals.Hope this helps.

Russ

Edited by CougarCouple, 30 August 2018 - 04:01 AM.

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F250 extended cab, Cougar from ATC. You guys rock thank you!

#3 Bellbear

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Posted 30 August 2018 - 04:03 AM

Thanks Russ. As in small, the red wire is the same gauge but not long in length. Not sure if that goes pos to neg
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#4 klahanie

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Posted 30 August 2018 - 04:08 AM

No. between batteries should be pos to pos. neg to neg.

So there should have been 2 short wires plus the pos and neg wires to camper system

 

?u=http%3A%2F%2Fwww.dieselhub.com%2Fimg%


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#5 klahanie

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Posted 30 August 2018 - 04:11 AM

are you sure both batteries are 12v ? each battery should have 6 cell caps if 12v

 

well you charged them so would know ...


Edited by klahanie, 30 August 2018 - 04:11 AM.

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#6 Bellbear

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Posted 30 August 2018 - 04:18 AM

I just bought this hallmark and owner says they are 12 volt BUT... they only have 3 cell caps. Does that change the wiring if 6 volts instead of 12 ?
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#7 Bellbear

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Posted 30 August 2018 - 04:20 AM

And I assumed cause the batteries were so big that they were 12 volt
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#8 klahanie

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Posted 30 August 2018 - 04:25 AM

I just bought this hallmark and owner says they are 12 volt BUT... they only have 3 cell caps. Does that change the wiring if 6 volts instead of 12 ?

 

yup.

it matters, per link from Russ

 

2x 6v should be like this...

 

?u=http%3A%2F%2Fcdn.blog.rvshare.com%2Fw

 

so no missing parts

all is well :)

 

but how did you charge them ? charger have auto select for charge voltage ?


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#9 pvstoy

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Posted 30 August 2018 - 04:31 AM

Take a picture and show us what you have.  Use a volt meter and see what the voltage is on each battery.  If 12 volt wire in parallel.  If 6 volt wire in series.


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#10 Bellbear

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Posted 30 August 2018 - 04:34 AM

No auto select, just a basic charger
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