Use a mighty vac, it's a hand held pump. Available at most parts stores
SOURCE: cruise control
Bet switches in steering wheel are bad...Very common. Especially if it has a air bag and the air bag light is on...I would clean the switches or if it has a air bag and the light is on replace the clock spring for the air bag and the light will go off and cruise will work again......
SOURCE: cruise control won't work
Does the on light in the dash come on? If not, you may have a broken switch in the steering wheel which is a fairly cheap repair. Otherwise, the controls work through the Printed Circuit Board in your dash (your instrument cluster) and the problem could be as simple as a solder defect or faulty component. The problem is that no Ford Service Technician that I know will touch this and tell you that you need to replace it.
The instrument cluster is very easy to replace but may cost you a few more dollars than you want to spend. I would have someone with an electrical background check the cruise control switches in your steering wheel with a multimeter before going any further with this. Also check the wiring for resistance leading from the switch to the cluster.
SOURCE: Cruise control not working
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
SOURCE: check engine light, cruise control light flashing,
Take the car to Autozone or similar business for a free code read with a scanner. Depending on what turns up, they will be happy to sell you any needed parts.
SOURCE: cruise control
Try to clean/change the brake switch. The switch is positioned at the brake pedal. On Accord 2003 it can be very easily removed by anti-clockwise rotation of the switch. You can replace the switch with a new one or you can clean the contacts of the old one, since the switch can be dismantled very easily.
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