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36V TO 12V START BACKUP

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I have a 36v system. i need to wire that to my 12 cranking battery for emergency starting. Does anyone have a wiring diagram for this? Thanks!
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Re: 36V TO 12V START BACKUP
Tap off one battery check voltage with meter
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Re: 36V TO 12V START BACKUP
like mike said, run wires from one battery, your 36v system is still only 3 separate 12v systems, you can still run 12v accessories from you 36v system as long as they are hooked to single batteries
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Re: 36V TO 12V START BACKUP
isnt there a way to make the 3 batteries produce one strong 12v current? my cranking battery dies and one of the other batt would not crank it by jumping it off so if i had all three ties to one it should have enough for one last crank.
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Re: 36V TO 12V START BACKUP
sounds like you have other problems, what is causing your battery to fail, are you playing a radio? is your motor not charging the battery while running?
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Re: 36V TO 12V START BACKUP
call me sent an e mail
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Re: 36V TO 12V START BACKUP
No radio. It has a 3 bank charger and 4 batteries. I don't see how it's suppose to charge all 4!?!?
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Re: 36V TO 12V START BACKUP
hum-mmmmm i'm a little confused right now over this! u mite need a 4 bank?? don't tust me!!! can u send a picture or diagram of how they are wired right now????
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Re: 36V TO 12V START BACKUP
I have looked over the wiring and I do not see in any way how the 3 bank charging system could be charging the cranking battery...so i apparently need to get a 4 bank or get a seperate single charger to charge my cranking battery...
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Re: 36V TO 12V START BACKUP
u bought the boat new or 2nd hand?
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Re: 36V TO 12V START BACKUP
2ND HAND, I FIGURED OUT THAT IT DOES NOT HAVE A CHARGER ON THE CRANKING BATTERY.
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Re: 36V TO 12V START BACKUP
motor should have a stator that charges the battery, if it doesn't you should charge your battery every time you come back, or at least a couple days before you go
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Re: 36V TO 12V START BACKUP
tuffhuntin is right it should be wired to motor for charging u sure its not? maybe u just have a bad battery did u get it checked out???? crank up your motor and check the voltage with a voltmeter while motor is running. u should show around lil over

13 to 14 volts r lil more if motor is charging battery. if it doesn't could be stator bad if it is just could be battery good luck
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Re: 36V TO 12V START BACKUP
erp did u find youre problem??
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Re: 36V TO 12V START BACKUP
Yes. Just user error. The cranking battery was not on a charger.
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Re: 36V TO 12V START BACKUP
does the engine charge the starting battery when engine is running?
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