Jumpstarting a semi truck with a car is not as hard as it may seem. All you need to do is have the correct jumper cables and the correct timing. Here are the steps you need to take to successfully jumpstart a semi truck with a car.
Step 1: Make sure both vehicles are turned off and in park. Connect one end of the red positive cable to the positive terminal of the car’s battery and connect the other end of the red positive cable to the positive terminal of the semi truck’s battery.
Step 2: Next, connect one end of the black negative cable to the negative terminal of car’s battery and connect other end of black negative cable to a ground away from both batteries. It is important that you do not attach this cable directly to either battery.
Step 3: Start up your car and let it run for about two minutes before attempting to start up your semi-truck. This allows for current from your car’s battery to reach your semi-truck’s battery.
Step 4: Try starting your semi-truck. If it doesn’t start, let your car run for another two minutes before trying again. Repeat this process until your semi-truck starts up.
Step 5: Once you have successfully started up your semi-truck, disconnect all cables in reverse order starting by removing black negative cable first, then red positive last.
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