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  1. Suprman

    keyed ignition wont' start HMMWV

    You can cheat and put a big diode between the crank and run leads. So when you are cranking you have voltage at the run position but not vice versa. Just make sure you put the diode the right way.
  2. Suprman

    keyed ignition wont' start HMMWV

    You need to have 24v at the run position when cranking or the fuel solenoid will not be powered. And the engine will not start. A lot of the cheap start switches don’t leave power to run when cranking.
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