Actually, I think hazard light is the wrong word, it's the parking light blinks instead of the turn signal (white lens flashes instead of yellow lens). My car has actually been upgraded to the euro-spec bumpers, *but* even with the old bumpers it would clearly flash a different bulb inside the yellow light housing (I believe there are two separate bulbs even though there's just one yellow lens), since the connector for the bumper lights was the same.
So doing a test of the behavior, it's actually quite weird:
If the headlights are off, the signaling a left turn causes the left turn signal to flash. Signaling a right turn causes the right parking light to flash.
If the headlights are on, both parking lights are on. Then signaling a left turn causes the left turn signal to additionally flash, signaling a right turn causes the right parking light to flash between bright and dim (dimming it off for part of the time, when the rear turn signal is on).
Pressing the hazard button causes the same behavior depending on whether the headlights are on or off. All the rear turn signals work correctly (except that the right turn flashing is slower due to the different time constant).
My guess is somehow the right turn got shorted to the right parking light, but the resistance of the parking light is lower (forming some sort of bootleg logical OR gate), but where to start looking for the short?
Last edited by Zuofu; 06-13-2019 at 08:54 PM.