Headlights inoperable 2001 Lexus RX300

Lexus RX300

Headlights inoperable

No lamps working, what could it be?

Using the wiring diagram provided you can see there is a main fuse and relays involved. Check those first before moving on to checking the combination switch. The combination switch would be the most common failure component.

Combination Switch – 2001 Lexus RX300 …
DRL (Daytime Running Lights) Relay Testing/Inspection

DRL relay testing

Headlight wiring diagram 1 of 2 – 2001 Lexus RX300

(best viewed in Google Chrome or Firefox)

Headlight wiring diagram 2 of 2 – 2001 Lexus RX300