Stoplight Switch

Check for continuity between the terminals of the switch.

STOPLIGHT SWITCH CONDITION

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

Fig 1: Identifying Switch Terminals

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.