How To Jump Start Truck With 2 Batteries. Make sure that it does not touch anything else. To jumpstart two 6 volt batteries wired in series would require you to attach the jumper cables in series as well.
Turn off lights and other accessories in the vehicle youre jump-starting. If you have two 12 volt batteries connect the positive side to the red connection first and then attach the negative side of the battery with the black connection or clamp the black connection to a metal piece to ground it. During the jumping process its best to use a truck with two batteries.
Youd connect to the outside posts you see in the picture.
To access the batteries youll need to look under the hood of the truck. Your owners manual may differ. You will jump it just like any other vehicle ignoring the other battery. Just under double the amount of energy in fact.
