Thread: Battery Jump Question

Originally Posted by MorganT69

So your telling me that I spent all that money on 24v lights when all I had to do was buy regular 12volt lights and only hook to one battery

That would be correct.

Sorry guys I'm late to the party. Was at my Daughters wedding rehearsal dinner and stupid done and forum runner wouldn't let me post. yES G is I tiredly correct in all his statements about jumping from a24 set up in our boats to a 12 volt cranking battery.

Originally Posted by MorganT69

You are right, he is asking about jumping a connected 24volt in series battery to a 12v battery, if they are connected you are getting 24v until you disconnect, I had an old John Deere tractor with a 24volt system and John Deere said I couldnt connect to one battery and jump a 12v system.

Yes, on your JD tractor it had a complete 24 volt wiring system. 24 volt starter, 24 volt Generator, 24 volt lighting everything wired 24. I think though he was incorrect if you had 2 12 volt batteries on the jumping part. Now you could have very well had a 24 volt battery, which were installed in some of the older tractors, dozers and other heavy equipment. There are a Miriam of ways of wiring some of that stuff up.

Boatbottom, here is a fail safe easy way to wire up a jumping system for a rig like yours. Get you a piece of black and piece of red #4 battery cable 6 inches longer than from post on cranking battery to post on closest trolling battery. Install ring eyes on the ends of the cables. Lay them in the compartment. Then figure the most continent point for you to access that cable. Cut both cables right there. Install a ANDERSON plug on both ends. Then install cables to the proper post on each battery. Just use electrical tape to seal ends of plugs. You might just for safety sake use wire ties to tie them off from flopping around. Ready made jumper cable, always there when you need it. Also, if using this or any other jumper set up, your cranking battery is dead, hook up jumper, let sit for 5 minutes or so. That way it transferes enough juice to put a surface charge on cranking battery. Then after cranking do not immediately remove the jumper. Let I build a little. Alternator- charging system can be overloaded and bur out rectifier.

Good place to start
https://www.batterystuff.com/battery...ga4ringSB.html

Just put your volt meter on one battery and see if you don't get 12 volts.

Originally Posted by deltarat

Just put your volt meter on one battery and see if you don't get 12 volts.

X2! Kiss principal

G is right but still a guber

All that technical rigamarole means nothing to a dummy like me, but of this I am sure: less than 24 hours ago I jumped my cranking battery off of a 24 volt trolling motor system and didn't disconnect a thing. Nothing blew up, no sparks, no nothing. My engine fired right up and off I went!!


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