I have a 1999 Lexus Es300. My headlights work during the day. Both of them. But at night my right lowbeam does not work. Sometimes it comes on and others it does not. I changed out the lowbeam bulb thinking it would fix the problem. Same thing is happening.

Has anyone else seen this ? Would love some suggestions. Thanks.

 

Sounds like it's a wiring issue to mo me. Either a wire is faulty, or the connection the bulb socket is loose. The lights that come on during the day are the High beams and that's a different wire/socket.

 

sounds like a grounding issue to me. find a wiring diagram and see where that system is grounded - take some steel wool to the ground, and see if that fixes it.

EDIT: Do you mean the "daytime running lights' come on, but your low beams do not? if that's the case, check the fuses first...