2009 Yaris Hatch (XP90) Low Beams not coming on

[Guyon]

Hey all,

Hoping someone can provide some insight on my low beam headlight failure. I noticed one day a couple weeks ago that the low beams were not actually coming on. The headlight indicator appears on the dash and the control backlighting come on, but the headlights do not, only the parking bulbs.

Pictured: Headlights on (left)/Headlights on + high beam (right, there is no difference aside from the lights actually turning on)


The high beams do turn on, but surprisingly the high beam light on the dash does not illuminate. This led me to believe that the headlight switch was bad so I replaced it, but unfortunately have no change in outcome.

Pictured: Headlights on, high beams off. Only parking lights on.


After reading many forum topics (including this excellent thread) I figured I may have a bad headlight relay (the one in the engine bay relay box). I replaced this too, but again, no result. Perhaps one hint is that there doesn't appear to be any difference whether this headlight relay is installed or not.

The relay I replaced lives in the little box labelled #2 (I do not have DRLs so I do not have the box labelled #3)

Diagram courtesy of this page.

Any help is appreciated. Thanks!