Pinpoint Test B: DTC B1483 - Brake Pedal Input Circuit Failure

WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Use the flex probe kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

B1 CHECK THE STOPLAMP OPERATION
- Key in OFF position.
- Observe the stoplamps while pressing and releasing the brake pedal.
- Do the stoplamps operate correctly?
- Yes : GO to B2.
- No : REFER to EXTERIOR LIGHTING to diagnose the stoplamps. Clear the DTCs. REPEAT the self-test.
B2 CHECK CIRCUIT 511 FOR AN OPEN
- Disconnect: Anti-lock Brake System (ABS) Module C155.
- Measure the voltage between the ABS module C155-41, circuit 511 (LG), harness side and ground while pressing the brake pedal.
  
  Fig 1: Measuring Voltage Between ABS Module And Ground While Pressing Brake Pedal
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to B3.
- No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
B3 CHECK FOR CORRECT ABS MODULE OPERATION
- Disconnect all the ABS connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the ABS connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . TEST the system for normal operation.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.