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 HEADLIGHT RELAY (Marking: HEAD LP)

Remove the headlight relay from the engine room R/B No.1.
Measure the resistance of the relay.

Standard resistance

SPECIFIED CONDITION AND TESTER CONNECTION

Tester Connection	Specified Condition
3 - 5	10 k ohms or higher
3 - 5	Below 1 ohms (when battery voltage is applied to terminals 1 and 2)

Fig 1: Identifying Headlight Relay (Marking: Head LP)

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

If the result is not as specified, replace the relay.