I have a 2001 2500 ram with cummins engine. My cruise control doesnt work. The light in dash stays on constantly. I was suspecting a problem with the cruise control servo. My question is is the servo vacuum operated and where is it, I have read that it is supposed to be under the battery on drivers side. I can only trace one vaccum line to the firewall which i assume is used to operate my heater blend controls. Would a problem with this servo cause to light to stay on all the time? I have checked all fuses also. only thing that I have not inspected is the clock spring assembly in the steering column, I did not look here because i read that if there is a problem here, my airbag light would be on. It is not
Country: United StatesMake: DodgeModel: RAM 2500 Quad CabYear: 2001Engine: cummins
inspect operation of the swith on steering wheel, along with all wiring in steering column
Welcome to just answer.com. I'm here to help you and your 100% satisfaction is my goal. Using a scan tool tell me what trouble codes are being stored in the memory?
I do not have a scan tool, but i can access one in a little bit. Just to be certain I made it clear, the light that stays on on my dash is the cruise indicator lamp. Not a check engine or anything. I never would have thought that a problem with the cruise would cause a trouble code. Never the less I will check it if you need. It will be an hour or so
Yes the check engine light will not always illuminate when you have a body control code. But if there is a trouble code present in the memory it will be very important and helpful to us so we don't go down the wrong path. The cruise control servo is not a bad guess they do have a lot of problems with them and they do go bad all often, Check the voltage on the Red/Light Green wire at the Powertrain Control Module, it should be 5 volts and then any time any of the switch buttons are pushed, the voltage should drop to a lower level. Try activating the servo with the scan tool in the Actuator Test Mode , with the vacuum applied to the servo the throttle should open and close when in the ATM
i checked for codes by turning key on and off three times. not sure if it will show same codes as using a scan tool, but heres what i got.
thats all it showed.
where is the servo located?
No you will not be able to read body control trouble codes through the instrument cluster it must be done using a scan tool, the servo's located under the battery tray on your vehicle
under the battery on driver or passenger side? I have already taken battery and battery box off of driver side looking for it. There is nothing there.
REMOVAL With Auto. Trans
INSTALLATION With Auto. Trans
ok all the parts in these diagrams are familiar to me, except the servo. As I said I have already taken battery box off once and there is nothing there. Im wondering if its possible that somone has removed it before I got the truck, becase there are no wires, servo, or vacuum line in this area. Perhaps it had a problem in the past and was removed I guess? Would you still like for me to obtain trouble codes?
Yes please of tame the trouble codes and the servo should be at the end of the throttle cable if you follow the cable from the throttle linkage
ok i will get codes and get back in an hour or so.
ok thank you
I scanned using obd II tool and have no stored codes. After looking at everything in the engine bay I am convinced that the servo and everything that goes with it have been removed. The throttle cable even goes straight from the throttle linkage through the firewall to the pedal. I am ready to accept your answer and give you highest rating, but i cn not find the accept answer button. Will it show up after I give a rating? Thank you for your time
Okay very good thank you if there's anything else I can do for you please just let me know
30 years experience, ase certified,shop owner