a few nights ago, I noticed that my headlights would flash (off/on once quickly- not the highbeam) when I would turn on my turn signal (2000 forester). It doesn't do it all the time and of course when we got home, we tried to reproduce the problem in our garage, but no flickering. THen the other night, my hand was simply resting on the turn stalk (just applied gentle pressure, but not enough to activate the turn signal) and I noticed the headlights flickered again.

 

So I'm guessing that there's some electrical gremlin, a bad contact, a bad ground perhaps? But where do I look or what do I check? the stalk? the headlight? some relay somewhere else?

Since the problem seems to happen when pressure is applied to the stalk then it would appear that there is a connection problem there.