RX 300 FWD V6-3.0L (1MZ-FE) (1999)
Brake Warning Indicator: Testing and Inspection
INSPECT REAR LIGHTS WARNING LIGHT
a. Disconnect the connector from the light failure sensor and ground terminal 3 on the wire harness side connector.
b. Start the engine, check that the warning light lights up. If the warning light does not light up, inspect the bulb or wire harness.