I am having a problem with turn signal on my 1986 325es.
Right turn signal function works fine with no problems.
Left turn signal:
* switch is blinking speed/sound is fast (just like if a bulb was burnt out-right side blinking is normal speed-sound).
* light on dash does not light up and neither does the front or rear exterior lights work while the blinking/switch is fast speed/sound.
* I have replaced both external bulbs and still does not light up. I switched out rear light assembly with right side and still does not work.
I only drive this car maybe 3-4 times per year in the summer only. The left turn signal for the past couple of years did work intermittenly....and now not at all.
There also may be a related issue with left side headlight light: when I turn on the brights the left side low beam does not work. Left Low beam works okay when brights are not switched on. No problem with right side.