I have a 91 dodge diesel and the voltage regulator went bad so i replaced it with a new one, but when i went to crank it........nothing, not a thing. It crank just fine before i took the old voltage regulator off........The battery checked out ok...... When i turn the key, Nothing, Anyone have a clue what might be wrong here.

 

Fusible link or neutral safety/clutch switch.

 

or start run relay or ignition switch, starter.things can just happen