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Home >> Ford >> 2005 >> Excursion 6.0 P, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Pinpoint Tests - 6.0L Diesel (99P F450/550) >> Pinpoint Test AY: Brake Pressure Applied (BPA) Switch >> Introduction >> Signal Function

Signal Function

The BPA switch provides a backup signal for the brake pedal position (BPP) switch. If the BPP switch signal is lost, the BPA switch provides the brakes-applied signal to deactivate the speed control system.

CAUTION: The powertrain control module (PCM) harness connectors must be properly seated and the connector latch properly attached to eliminate possible driveability concerns or a no-start condition. Installing PCM connectors on an angle may cause an improper connection, misdiagnosis, and damaged components. Install the connector until the lever pivots and seats itself. Apply light pressure to get the connector into position on the PCM and then fully seat the connector.
NOTE: Visually inspect the harness connectors for corrosion, damage, proper mating, and correct pin tension.
Fig 1: Identifying PCM Body Harness Connector And Brake Pressure Applied Switch Connector
G03982275Courtesy of FORD MOTOR CO.