Circuit Description
WARNING: This page is about a different car, the 2003 Lexus GS 430, 2003 Lexus GS 300, 2002 Lexus GS 430, and 2002 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
The lamp failure sensor detects a wire break of the stop light, high mount stop light and taillight and sends that signal to the body ECU No. 2.