On-Vehicle Inspection

WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT HEADLIGHT RELAY (Marking: HEAD LP)

Remove the HEAD LP relay from the engine room No. 1 relay block.

Measure the resistance of the relay.

Fig 1: Identifying Headlight Relay Connector Terminals

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Specified Condition
1 - 2	10 kΩ or higher
1 - 2	Below 1 Ω (when battery voltage is applied to terminals 3 and 4)