I've seen a number of threads looking for the flasher relay and needed the information myself. Found this thread and thought it was worth a bump back up to the collective conscious.
The picture is spot on. The relay is on the left side of the steering column mounted on a tab. Remove the 4 screws and one bolt holding the cover panel below the steering column. Disconnect the hood release and left front speaker wire to free panel. Remove the HVAC tube that crosses under the steering column for easier access to the relay. It would have been super easy to get to if I could have removed the HVAC tubing attached to the vent but I couldn't loosen the upper screw holding it on.
It took a little persuasion to remove the relay off the tab, and one of the latching tabs broke off when I tried to separate the connector from the relay, so be careful. Also, one of the female terminals in the connector was crimped on to the middle spade terminal of the relay really tight,...i almost ruined the connector, again, be careful.
On another forum I read a quip from a former Master Toyota technician saying, "Have fun."