System Pre Check

Schematic:

DESCRIPTION
Code 11 is caused by the stoplight switch (13480) being closed prior to the vehicle moving. If the stoplight switch remains closed when the vehicle begins to move, the REAR ABS warning light will turn on at approximately 26 km/h (16 mph). Code 11 will not be latched in the anti-lock electronic control modules memory until the speed of the vehicle exceeds 60 km/h (37 mph) for at least 10 seconds. If the vehicle does not exceed 60 km/h (37 mph) for at least 10 seconds, then the REAR ABS warning light will turn on but the anti-lock electronic control module will not latch a code. Code 11 can be caused by a driver who is resting his or her foot on the brake pedal with just enough pressure to close the stoplight switch, while driving at least 60 km/h (37 mph) for a minimum of 10 seconds. When this occurs, a Code 11 will be latched by the anti-lock electronic control module.

POSSIBLE CONTRIBUTING BASE BRAKE COMPONENT/VEHICLE WIRING CONCERNS
- Terminal backout in the anti-lock electronic control module harness connector at Pin 11
- Missing (burned-out) stoplight bulbs. All stoplight bulbs must be missing or burned-out to cause a Code 11
- An intermittent/continuous open in Circuit 810 (R/LG) for Aerostar or 511 (LG) for Ranger. This open would be between module connector Pin 11 and the stoplight switch
- Worn or damaged stoplight switch

NOTE: Use Rotunda(r) 73 Digital Multimeter 105-00051 or equivalent for electrical tests.