Once the vehicle starts, quickly remove the jumper cables so that the car’s alternator can take charge of the 24 volt system. Drive at higher revs for about a minute before starting your car. Double-check that the jumper cables are connected to the same battery in the 24V system.Īs soon as the alternator starts charging the vehicle’s battery, you will hear the rumblings coming down the car. Now, hook the – (negative/black) jumper cable to the earth terminal of the 12V car battery. First, hook the cable to the red (+) terminal of the 12V car battery and the + (positive/red) jumper to the terminal of the 24-volt system. It is easy to build a 24 volt battery from two 12 volt batteries. If you have two 12 volt batteries, first connect the positive side with the red connection and then connect the negative side of the battery with the black connection or press the black connection on a metal piece. You may have two 12 volt batteries or two 6 volt batteries. To perform the task you will need a boost converter capable of generating output voltages greater than 24V. You cannot use a 12V charger directly to charge a 24V battery. When the truck’s charging system is finished, you won’t get a 24 volt boost in a 12 volt system. And when jumping you will tap in the middle of the 24 volt setup. You can jump from a 24 volt system to a 12 volt system by connecting to a ground side battery. Keep the 24 volt vehicle neutral and start it by following the normal procedure. Now connect a second jump lead between the negative terminal and the engine block. Attach a jump lead from the positive terminal of the 24v vehicle battery to the positive terminal.
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