Drivers of 2007 Ford Edge and Lincoln MKX models may complain of a burning odor while driving.
They also may comment that the vehicle feels like it's down on power, and that the integral vehicle dynamics (IVD) light on the dash sometimes comes on after driving for several miles.
One likely cause for all these symptoms, reports Ford, is brake drag. How to correct it depends on which wheels are binding.
Start your diagnosis by getting the vehicle on a lift. Spin each wheel by hand to determine where the brake drag is taking place.
If all four wheels are affected, chances are the brake switch is sticking, which causes the hydraulic circuits to stay pressurized with no change in the brake on/off input status from the switch to the module.
That's what causes the IVD light on the dash to come on.
To nail the brake switch as the cause for the drag definitively, lower the vehicle, disconnect the harness from the switch and rotate the switch clockwise.
If the brake pedal abruptly moves up, that clues you in that the switch plunger is jamming. Replace the brake switch with a new-design unit, part No. 8T4Z-13480-A, making sure the brake lights work properly when pressing down on the pedal.
If only the rear wheels bind when spinning the wheels, the parking brake equalizer needs adjusted, according to Ford.
Make sure the parking brake pedal is fully released, then adjust the equalizer until both rear wheels rotate freely. When properly adjusted, the distance between the cable nut and stud should be about 7/8 inches.
"Factory Fixes" is written by Jim DePalma, a 30-year veteran of the auto repair business who has served stints as a service manager, parts manager and ASE-certified technician. His column provides vehicle manufacturers' authentic factory technical service bulletins (TSBs) that have been condensed for easier reading. Mr. DePalma advises that techs always check with a dealer or repair information system for the latest revisions before starting to work on a vehicle. He can be reached via e-mail at [email protected].