Anti-Theft Indicator Light
WARNING: This page is about a different car, the 2002 Lexus GS 430 and 2002 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
Inspect the anti-theft indicator light operation. Connect the positive (+) lead from the battery to terminal No. 2 and negative (-) lead to terminal No. 5, and check that the anti-theft warning light, located on the light control rheostat, lights up. See CONNECTOR IDENTIFICATION . If operation is not as specified, replace the light control rheostat.