My left turn signal stopped canceling automatically, so I delved into the column, expecting it to be the cancel cam that had broken. The Cancel Cam is the same thing that has the horn contact stem.
The steering wheel must be removed and the lock plate must be depressed to remove the lock ring, then the plastic cover plate. Once these are removed the cancel cam will slide out and the turn signal switch is visible.
There are two little springs on the turn signal switch. One toward the top, and one to the lower left. I found that one had broken. This was for the left turn cancel function. Planning to replace the switch, I removed the three hold-down screws and the turn stalk screw only to find that there was a multi-wire harness attached that snakes down into the column.
Not wanting to drop the column and tear into something I know nothing about, I called ThaDriver to secure a spring from one of his parts cars. As I was gathering my tools, I picked up a replacement Dorman cancel cam I had bought (might as well put in a new one while in there) and noticed printed inside the blister pack was a notice. "Turn Signal Switch Springs Also Available." That was better news than a half-price sale on Stewart Avenue (Atlanta Area Inside Joke).
Looked up the part on Dorman, and called O'Reilly Auto Parts, they had the part in about 5 hours for $3.49. Thought about driving down to Stewart Avenue to take advantage of the money and time I saved, but I eventually decided it was too far to drive.
Dorman Part Number 49312 Turn Signal Cam Retainer Spring.
