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

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
- Press the brake pedal.
- Do the stoplamps operate correctly?
- Yes : GO to B2.
- No : REFER to EXTERIOR LIGHTING .
B2 CHECK CIRCUIT 810 (RD/LG) FOR AN OPEN
- Key in OFF position.
- Disconnect: Anti-lock Brake System (ABS) Module C135.
- Key in ON position.
- Measure the voltage between the ABS module C135 pin 41, circuit 810 (RD/LG), harness side and ground, while pressing the brake pedal.
  
  Fig 1: Checking Circuit 810 (RD/LG) For An Open
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to B3
- No : REPAIR the circuit. CLEAR the DTC. REPEAT the self-test.
B3 CHECK FOR THE 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.