Wiring Diagrams
WARNING: This page is about a different car, the 2003 Lexus ES 300 and 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
For headlight dimmer and turn signal switch wiring diagrams, see HEADLIGHTS in SYSTEM WIRING DIAGRAMS article under ELECTRICAL. For horn switch wiring diagram, see HORN in SYSTEM WIRING DIAGRAMS article under ELECTRICAL. For ignition switch diagram, see STARTING/CHARGING in SYSTEM WIRING DIAGRAMS article under ELECTRICAL.