Intermittent turn signal failure (first works then doesn't)

Just had that happen on my f53 chasis in Vancouver on our way home. Turned out when I wiggled the wires coming down the steering column it worked. Followed the wires to the firewall just at the base of the steering column and they plugged into a relay attached at the firewall. Unplugged and plugged in the wires again and problem solved ! Connection at the relay was loose from vibration and the occassional rubbing of the winter floor mat.