Cruise control allows the driver to set a desired speed for the car, forgoing the use of the accelerator to drive the car. This is useful on long journeys where the driver's foot can get tired. There could be a number of reasons why the cruise control fails to engage or work properly; the most common reason is a blown fuse.
Test the cruise control to determine what aspects of it are not working. Does the speed not set? Does the light not come on? Can it not be adjusted once engaged? If the light does not come on when cruise control is engaged, then the problem may be electrical. If the light does come on but the system still does not work, then the problem may be a little more complex.
Replace the fuse. If the unit is not lighting up then a blown fuse may be the problem. Locate the fuse box for the vehicle. This is under the steering wheel below the dash panel on the driver's side. Open the fuse panel and locate the cruise control fuse. Consult the owner's manual, as the location of that fuse may be unique to that year's model. Once the fuse has been located, pull it out to remove it. Replace the fuse with a similar fuse. Test to see if the cruise control works.
Check the wiring. Look at the wiring coming from the cruise control unit. See if the wires are frayed or damaged. In addition, check the wires coming from the brake and accelerator to make sure they are intact. A faulty or loose wire could be responsible for the issue. Check the fuses for the brakes as well, since a faulty brake fuse may also disengage the cruise control.
- Toyota: 4 Runner Service Manual: 2005
- Mister Fix It: Cruise Control Basics
- Photo Credit view of the undercarraige of a suv image by Michael Shake from Fotolia.com
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