Brake Light Switch: Testing and Inspection

Fig.1 Brake Lamp Switch Terminal Identification:

The brake lamp switch can be tested with an ohm-meter. The ohmmeter is used to check continuity between the pin terminals.

Switch Circuit Identification
- Terminals 1 and 2: brake lamp circuit
- Terminals 3 and 4: RWAL/ABS module and Powertrain Control Module (PCM) circuit
- Terminals 5 and 6: speed control circuit

Switch Continuity Test

NOTE: Disconnect switch harness before testing switch continuity.

With switch plunger extended, attach test leads to pins 1 and 2. Replace switch if meter indicates no continuity.
With switch plunger retracted, attach test leads to pins 3 and 4. Replace switch if meter indicates no continuity.
With switch plunger retracted, attach test leads to pins 5 and 6. Replace switch if meter indicates no continuity.