Does a 1997 Dodge Cummins Diesel have to both batteries on it for crank even if you try pull start it?
No, a 1997 Dodge Cummins diesel does *not* require both batteries connected to crank, even if you're pull-starting it. Pull starting relies on the engine's momentum to overcome the compression, not the starter motor. While having both batteries improves the overall electrical system's performance, a single functioning battery is sufficient for the ignition system needed to start via pull-starting. However, it is strongly recommended to have a fully charged battery connected, even if pull starting. The ignition system requires electricity, and a weak or dead battery may cause starting problems, even with a pull start.