【How-to】How do you jump start a 24 volt system with a 24 volt system

On a two battery system, you can jump from the 12 volt system, connecting to the ground side battery in the 24 volt system. When you do that, you are tapping into the middle of the 24 volt setup and when the truck’s charging system takes over, you won’t get a 24 volt surge into the 12 volt system.