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 LICENSE PLATE LIGHT ASSEMBLY

Disconnect the connector from the license plate light.
Measure the voltage of the connector.

Standard voltage:

LH Side

SPECIFIED CONDITION AND TESTER CONNECTION

Tester Connection	Condition	Specified Condition
Q47-1 (B) - Q47-2 (E)	Dimmer switch ON	10 to 14 V
Q47-1 (B) - Q47-2 (E)	Dimmer switch OFF	Below 1 V

RH Side

SPECIFIED CONDITION AND TESTER CONNECTION

Tester Connection	Condition	Specified Condition
Q44-1 (B) - Q44-2 (E)	Dimmer switch ON	10 to 14 V
Q44-1 (B) - Q44-2 (E)	Dimmer switch OFF	Below 1 V

Fig 1: Identifying License Plate Light Assembly Connector Terminal

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

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