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Every person who owns a vehicle with multiple batteries should spend a few minutes or a week if necessary to understand how their batteries are hooked up. That could be a truck, battery, or life, saver. There are safe shortcuts such as jumping only the dead pair of batteries to get the vehicle...

Connect the jumper cables across one 12v pair of batteries, charge a few minutes, then move to the other pair of 12v batteries. Probably only one pair is dead, either the lower 0-12v pair. or the 12-24v pair. Normal layout will have the 0-12 volt pair further from the frame toward the outside...