No start on 1996 Dodge Ram Van 2500

why does keyswitch turn, dash lights up, but no click is heard at starter

2 answers
This can be from a few different things. You may have a bad ignition switch, starter or the wiring and circuitry that allows for the starter to operate. It will require a diagnosis to determine exactly what is wrong.
Shift the transmission into neutral than try to start the vehicle.