On stock (XL rated) tires, 35psi front, 41psi rear
Yes.
80 psi Check the label on the driver side door jamb for recommended pressures.
It is inside the distributor.
Black box under the hood by the battery
No, Dodge does not use inertia/reset swithces.
On my 92 B250, the voltage regulator is integrated right into the alternator. The engine computer is the voltage regulator on a 1989 Dodge Ram Van.
You can't If all pressures are correct and the light is on, you will need to take it to a shop that can test the sensors in the wheels.
The engine computer is the voltage regulator on a 1991 Dodge.
Dodge has never put the pump on the outside of the tank on any fuel injected Ram Vans.
junk yard
may be in fuel tank
Check on the drivers door jam tag. Pressures should be there and in the owners manual. Should go by vehicle spec not tire spec.