Stoplight Switch

Check for continuity between the terminals of the switch.

Fig 1: Identifying Stoplight Switch Connector Terminals

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

TERMINAL CONNECTOR OF TESTER SPECIFIED CONDITION

MEASUREMENT CONDITION	TERMINAL CONNECTOR OF TESTER	SPECIFIED CONDITION
When brake pedal is depressed.	1 - 2 (for stoplight switch)	Less than 2 ohms
When brake pedal is depressed.	3 - 4 (for normally closed brake switch)	Open circuit
When brake pedal is not depressed.	1 - 2 (for stoplight switch)	Open circuit
When brake pedal is not depressed.	3 - 4 (for normally closed brake switch)	Less than 2 ohms