Brake Signal: Description and Operation

1996 Lincoln Continental V8-4.6L DOHCSECTION Description and Operation

Typical Brake Pedal Position Switch:






PURPOSE
The signal informs the Powertrain Control Module (PCM) to disengage the torque converter clutch.

On certain applications, the PCM adjusts the engine idle speed with the brakes applied and the A/C turned On, or turns the A/C Off after a calibrated time.

OPERATION
The Brake On/Off Switch (BOO) signals the PCM with a battery voltage (B+) signal whenever the vehicle brakes are applied.

If all the stoplamp bulbs are burned out (open), a high voltage is present at the PCM due to a pull-up resistor in the PCM. This provides fail safe operation in the event the circuit to the BOO switch has failed.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.