2001 Dodge truck with Cummins diesel cruise control problem

Connect the fuel pump to direct 12 volt power. That checks the pump.

Then test the relay

https://www.google.com/search?q=2001+dodge+ram+2500+diesel+5.9+cummins+fuel+pump+relay+location

That is just about right.

in fuse panal

Check the linkage. It may have been knocked off.

Check the headlight switch. The power goes from the fuse to the headlight switch and then to the dash and running lights.

nwbombers.com

Awesome group for anything Dodge/Cummins diesel truck related!

Have you had a mot or try checking with an mechanic¬!

The pump is located on the passenger side of the engine compartment, back by the firewall. Look in the middle of the firewall by the cowl and you'll see a small plastic line going into the cowl. follow it back and you will come to a T fitting. Follow it to the passenger side and it will go into the Vacuum pump that controls the Cruise control.If you follow it to the other side, it goes under the Battery box. this is where the Servo for the cruise is located. Check the lines for small cracks, wear spots or even breaks. The plastic line can get beaten up pretty easily.
The easy way to see if it is your vacuum pump, turn the key on and listen. you will hear 2 distinct sounds. The first sound will stop in about 15 - 20 seconds. (fuel pump?) the second sound is the vacuum pump. If it turns off in 45 seconds to a minute (or slightly longer) the vacuum pump is probably ok, as are the plastic lines. The sound of the pump stopping means that vacuum has been achieved and is holding vacuum. If it keeps running, the pump is bad or the lines have a break in them. If the lines have had a hole in them for a long time, the diaphragm in the pump will have gone south. This is not a servicable part and the pump will have to be replaced. The pump is available from a dodge dealer but most likely the parts guy will not have a clue as there is no picture in their manual and a very poor description. When talking to them ask for a "03 Ram 2500 CUMMINS Cruise vacuum pump"
The part costs $212.70

TPIM PROBLEM , MUST HAVE COMPUTER FLASHED AT DEALERSHIP

The cruise control on y 1997 dodge cummins diesel 4x4 suddenly stopped working.I checked the fuses but they are ok.any solutions?