My 2001 Dodge ram 1500 5.2 has lots of issues. I checked all fuses and they are ok,changed rear differential sensor,transmission speed sensor,brake pedal switch,and bleed the brakes and ABS and brake light come on and off at the same time. if you let engine sit at idle lights will go off for several minutes,put it in gear and they come back on. Speedometer jumps around and does not work,odometer is not registering correct,drive it ten miles it records 1 mile,cruise control does not work. All other gauges work fine. I even swapped out ABS module with my 1998 ram and module checked out fine. I could use some help on this if any one has some suggestions.

 

Warranty out the rear wheel speed sensor. That's where the PCM gets it's clue for the speedometer. If that isn't working properly, none of the other systems that rely on wheel speed will work either.

 

Update! Problem solved,I hope this helps someone else in the future who may have front end body work from being in a wreck. Body shop did not tightened down 2 sets of ground wires on drivers side fender under cruise control solenoid. Now everything works and runs like new.