Remove the steering wheel and take a look at the return mechanism. You will see what needs to be cleaned and lubed.

Dennis,
And I still can't type on this Windows 8 Phone!
________________________________
From: Rocket J Squirrel<mailto:camping.elliott@GMAIL.COM>
Sent: ‎1/‎18/‎2013 7:55 PM
To: vanagon@GERRY.VANAGON.COM<mailto:vanagon@GERRY.VANAGON.COM>
Subject: Turn signal switch reluctant to return to "off"

At first I thought this might be related to below-freezing temps gumming
things up, but these past few days haven't been very cold and the
problem persists.

The turn indicator doesn't auto-off reliably when the steering wheel is
returned to neutral after making a turn. Some worn-out part, I expect.

--
Jack "Rocket j Squirrel" Elliott
1984 Westfalia, auto trans,
Bend, Ore.