Here are the instructions to test the braking switch and related components to locate the fault.
Brake Pedal Position Switch Test
1.) Disconnect the 4P connector from the switch (A).
2.) Remove the brake pedal position switch.
3.) Check for continuity between the terminals according to the table, using a multimeter.
4.) If the continuity is not as specified, replace the brake pedal position switch and adjust the pedal height.
5.) If OK, install the brake pedal position switch and adjust the pedal height.