Hit a bump - directionals on dash blink!? Help
 

2006.5 XB, 41k miles, no mods since new. Stock lights all around.
Problem
Last week it sounded like there was a bug buzzing under the dash, now I believe it was a relay behind the clock. This week when I drive down a bumpy road or RR tracks, both green arrows on the dash blink. They could blink once or 5+ times really fast. I do not know if my tail-lights are blinking at the same time. Sometimes when move the turn signal the opposite arrow will blink once. Everything else seems OK.

Any ideas? Anybody?

DW