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nickb2Wrench. Diagnostic Tech.
If you have a vacuum pump handy, just apply vacuum to reservoir and see if it will hold! Try this before tackling the removal of bumper. Try to isolate all vacuums as one reservoir does multiple jobs. Might be another line losing vacuum and affecting the cruise. If heater blend door hose is cut,loose or whatever, it may cause cruise to not hold when asked to by "set" button. ....x nickb2Wrench. Diagnostic Tech.
Forgot bout the check valve!!! Thanx Jim!! ....x Hope this helps, I had the exact same problem with my 2001 Grand Cherokee, ((fan position switch won't work (go from floor to dash to windshield, etc.)), and the cruise control won't engage. I'm told both are due to a vacuum line problem, ). I fixed mine by replacing 1/4" hose located directly under battery mounting pan. Takes a little work but might be worth it. First remove battery. Then remove pan, you'll need a deep socket 10mm with extentions to get at one mounting nut. Remove two nuts holding cable to fuse/relay box attached to pan. Move pan out of way. The hose that's causing all the problems is about 6" long going to servo. Replaced hose ($.77) and it took care of both problems. Total job took about 1 hour. From what I have been reading this is the hose that's causing everyone problems.
Estimate price near meHow A Diagnostic Works Instantly book a certified mobile mechanic to come to you Mechanic diagnoses the problem and quotes necessary repairs Your vehicle is ready to go Fair, upfront & transparent pricing for all services Our certified mobile mechanics can come to you now. How much does a Cruise control is not working Inspection cost?On average, the cost for a Jeep Grand Cherokee Cruise control is not working Inspection is $95 with $0 for parts and $95 for labor. Prices may vary depending on your location.
Show example Jeep Grand Cherokee Cruise control is not working Inspection prices Cruise control can be very convenient when on a long drive or when on the highway. By setting a speed, you can relax your foot and let the vehicle maintain speed. More modern cruise control systems even allow you to maintain speed and a certain distance behind the vehicle in front of you. When cruise control fails, it can be annoying, but when it fails suddenly it may be dangerous. A sudden failure by the cruise control may mean your vehicle is rapidly decelerating. Even when cruise control is on, it is important to remain a vigilant driver. How this system works:Cruise control systems have changed as cars have become more modern. Newer cars use a fully electronic setup to maintain speed and may be able to maintain speed and distance behind the car in front of you. These systems are controlled through the vehicle’s computer or ECU (electronic control unit). Older cars may use what is called electromechanical cruise control. In this setup, a vacuum actuator is physically connected to the throttle by a cable or chain. The cable adjusts to increase or decrease throttle position based upon the actions of the actuator. A mechanic will let you know what kind of setup you have on your vehicle. Common reasons for this to happen:
What to expect:A top-rated mobile mechanic will come to your home or office to determine the reason why your vehicle’s cruise control system has stopped working. The mechanic will then provide a detailed inspection report outlining the nature of the system failure and the cost of any repairs that need to be made. How it's done:The mechanic will first want to connect to the vehicle’s ECU through a code reader/scanner. This will allow the mechanic to read and trouble codes and better diagnose what component may have failed. If the mechanic determines that there is a bad fuse, he or she will find the corresponding fuse for the cruise control system to see if it has failed. If the fuse has blown, the mechanic will remove it and replace it with a fuse rated for the correct amperage. If the mechanic believes that the brake pedal switch has failed, he or she will examine the switch to check for any superficial damage. The mechanic should then check the wiring connected to the switch and change it if necessary. When the switch has been replaced, the mechanic should make sure that both the brake lights and the cruise control system are working properly. To check the speed sensor, the mechanic will have to get underneath the vehicle. While underneath, the mechanic will find the sensor and examine it and the surrounding wires for damage. The mechanic will then replace the sensor and then check the wires going from the sensor up to the speedometer and cruise control switches to endure that they are not frayed. If the mechanic believes that the vacuum actuator or the corresponding hoses and cable have failed, he or she will open the hood and locate the actuator. The mechanic will first check the hoses and cable to make sure that they are in good working order. He or she will then replace the actuator as necessary. In all of these repair scenarios the mechanic will ask to test drive the vehicle to make sure that the cruise control is working properly. He or she should also use their code reader/scanner to clear any trouble codes that may have been produced when the cruise control system was not working. How important is this service?A failed cruise control system can be a signal that other repairs may need to be made soon. By examining the cruise control, the mechanic is likely to also inspect other systems on the car including the brake lights and speedometer. While driving without cruise control may be an inconvenience, a sudden failure of the cruise control system could be potentially dangerous for a driver who is not vigilant. If you notice that your vehicle’s cruise control has stopped working you should have a mechanic check it to determine the nature of the problem. Fast and easy service at your home or office Backed by 12-month, 12.000-mile guarantee Recent articles & questionsHow to Find the Best Car Loan Rate Usually, you won’t have the full payment on hand when the time comes to buy a car. Car loans exist to help you purchase a vehicle through funds borrowed through a lending facility or bank. You can get a car... What should I know about turning traction control off?The purpose of a vehicle’s traction control system (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-traction-control-module) is to assist drivers in maintaining stability and control of the vehicle during adverse weather conditions or when the vehicle is stopped abruptly. There are electronic sensors in each wheel that... My car has the code p0171 and i fixed multiple things and cleared the code as well and it still shows upA number of things may cause code P0171 to be triggered. As the code indicates, this means there is a lean fuel condition which may be caused by a lack of fuel supply or in some cases, a vacuum leak.... Wow,... I never expected to find a website service like this when I started researching this issue
Why is my cruise control not working in my Jeep Grand Cherokee?A vehicle's cruise control may stop working if the vacuum actuator has stopped working or if there is damage to the vacuum hoses. The system may also fail if the cable linking the actuator to the throttle is broken.
Why won t my Jeep Cruise Control work?The most common reasons a Jeep Wrangler cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
Does Jeep Grand Cherokee have cruise control?The Jeep Grand Cherokee L's adaptive cruise control system adjust your driving and matches your speed automatically to stay within a pre-selected distance from the vehicle ahead of you.
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2002 jeep grand cherokee cruise control not working
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