On-Vehicle Inspection

WARNING: This page is about a different car, the 2006 Lexus IS 350 and 2006 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT HIGH MOUNTED STOP LIGHT ASSEMBLY

Disconnect the high mounted stop light connector.
Measure the voltage of the connector.

Standard voltage

SPECIFIED CONDITION AND TESTER CONNECTION

Tester Connection	Condition	Specified Condition
Q25-1 - Q25-2	Brake pedal released	Below 1 V
Q25-1 - Q25-2	Brake pedal depressed	10 to 14 V

Fig 1: Identifying High Mounted Stop Light Connector

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

If the result is not as specified, repair or replace wire harness or connector.