Wiring Diagrams
WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
For combination switch, relays and hazard switch wiring diagrams, see HEADLIGHTS and EXTERIOR LIGHTS under SYSTEM WIRING DIAGRAMS in ELECTRICAL. For horn switch wiring diagram, see HORN under SYSTEM WIRING DIAGRAMS in ELECTRICAL. For ignition key switch wiring diagram, see STARTING/CHARGING under SYSTEM WIRING DIAGRAMS in ELECTRICAL.