My bus's rear start panel had been eviscerated by the previous owner, and all the switches were gone. Crown had used a three-switch setup - Ignition, Safety, and Start, which I thought was unnecessarily complicated, so I did away with the Safety switch. The rear Start switch sends power from the run ("Ignition") solenoid in the front junction box to the rear panel's Start solenoid which then triggers the starter's solenoid. Rebuilding that was easy, but I then couldn't turn off the engine from the rear panel! Instead of faffing about with the DDEC computer for a shut down function, I simply ran a 50 ft length of 10 AWG wire from the front Ignition solenoid's ground terminal back to the rear panel's Ignition switch, and then to a good ground nearby. Easy! Now the DDEC doesn't see any difference whether I switch off the engine from the front or the back - either way, the front Ignition solenoid's ground is disconnected, turning everything off. The rear panel's new Start switch is a push-On Dorman 86915 SPST with a rubber boot, and the new rear Ignition switch is a K-Four 16-140 pull-On / push-Off SPST. While I had everything apart I also replaced all three solenoids with new Cole-Hersee 24059 continuous-duty ones - the old ones were still working, but why take a chance with them?
Keep a CO2 extinguisher handy if you're worried about a runaway, and jet it into the air intake if the engine runs away.
John
