Ok. So you have it wired in series. 24 volt system. To use a 12 volt charger, you'd need to hook the leads to + and - on only 1 battery at a time Make sure what you're hooking it up to is a 24v system
ITS ALIVE and running muahahaha. Thanks to all of you "hows you" guys!! (his truck on one batt and the charger on the the other batt)
He's still in his unleaded work truck, he bought this from a neighbor that moved away, we don't want to be snowed in again like last spring.