parking, side (fender) and tail lights on a left side do not work

[kozulin]

Hi
My problem is - if I turn on "parking light" position (first position clockwise on headlamp switch) - i have front parking, fender/turn (orange) and tail lights on only on right side. Left side is off. If I turn "beam light" position (further clockwise position on headlamp switch) i have low/high head light on and only right tail light on. Brake and turn lights work fine any time.
As it looks like that it is not bulb problem (fender/turn bulb works) my question: is it "headlamp switch" problem? Or fuse problem (what makes me confused - there is only one fuse for both taillights)? Or wire? Or something else?
I tried search and did not succeed on my problem.
Please advise me my next steps to solve this problem...
Thank you