Won't crank

Start by looking around in the engine bay for this:

http://www.forabodiesonly.com/mopar/showthread.php?p=1705079

http://www.forabodiesonly.com/mopar/showthread.php?t=168214

http://www.forabodiesonly.com/mopar/showthread.php?t=14304&highlight=interlock



And if you have it, locate the yellow / yellow tracer wires going to the connector, and splice them permanently together

If you do NOT have it, then troubleshoot the starting wire to the relay, the relay, and to the clutch safety or automatic neutral safety switch, depending.