Dash lights blink with left turn signal

So problem solved - it was a faulty headlight switch. Figured it out by testing the resistance of the tan wire at the switch to the orange "instrument light" wire - they were connected. Then I tested the resistance across the switch from the power to the tan wire post - nothing. Resistance from the power post to the headlight post was over 200 ohms. Replaced the switch and viola - everything works as it should. I did start out by checking bulbs and grounds as suggested so it simply became a game of elimination.