Van won't start, lights come on but nothing, no crank, lights come on. on 1999 Dodge Ram Wagon 3500

I replaced starter, cat converter, oil change, trans oil change, tune up, new battery, clean cables.

Asked by for the 1999 Dodge Ram Wagon 3500
Why did you replace the starter, was it a no crank situation? Check your connections at the starter, battery.
If the connection are good then you will have to trouble shoot electrical, may be in your ignition switch, stater relay or solenoid, wiring, fuse.
If you do not know how, we specialize in electrical/elctronics.
Andre or Bart 925-947-2555