Brake Drag From Rear Wheels Or All Wheels - 2007 Ford Edge & Lincoln MKX

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FORD:	2007 Edge
LINCOLN:	2007 MKX

Some Edge/MKX vehicles may exhibit brake drag from the rear wheels or all wheels.

Customers may notice an odor and/or reduced powertrain performance.

In some cases, the driver may also note an integral vehicle dynamics (IVD) light after driving a given distance due to pressure noted in the module without a change in brake on/off (BOO) state.

SERVICE PROCEDURE

Raise the vehicle on a hoist, with engine running, and vehicle in park. Rotate all of the wheels by hand to verify excessive force is necessary to turn wheels.

To resolve the brake drag concern from all wheels – Replacement of the BOO switch is necessary.
To resolve the brake drag concern from the rear wheels only – Adjustment of the park brake cables are necessary.

BOO Switch Replacement (All Brakes Drag)

Removal

With the vehicle shut off and in park, remove the stop lamp switch by rotating the stop lamp switch in the clockwise direction.
If the brake pedal moves up during the removal of the switch, the pedal was being inadvertently held down by the stop lamp switch thus keeping the hydraulic circuits pressurized.
Disconnect the wire harness connector from the switch and discard the switch.

Installation

NOTE: INSTALLATION OF THE NEW STOP LAMP SWITCH MUST BE DONE WITH THE BRAKE PEDAL AT ITS NORMALLY INSTALLED AND RESTING POSITION. DO NOT PULL UP OR PUSH DOWN ON THE BRAKE PEDAL DURING STOP LAMP SWITCH INSTALLATION.

With the brake pedal at its rest position, insert the new stop lamp switch into the keyed hole on the brake pedal and rotate the switch 45 degrees counter-clockwise to seat the switch. You may hear a click sound during this step, this is normal.
Plug the wire harness connector to the new stop lamp switch.
Verify that the brake lamps are functioning properly and that the brakes are no longer dragging.

Park Cable Adjustment (Rear Brakes Drag)

Brake drag noted on rear wheels only likely caused by over adjusted park brake equalizer adjustment (or all 3 cable lengths built at the minimum levels).

With vehicle on Hoist and shut off, verify rear brake pads are positioned properly.
With a fully released parking brake pedal, back off the adjustment until the wheels spin freely.

NOTE: DISTANCE BETWEEN THE NUT AND END OF THE STUD SHOULD BE 7/8″ (22 mm)