
Does the rest of the indicator stalk work OK?
You could try removing the upper shroud and disconnecting then re-connecting the indicator stalk connector about five times.
You may have to remove the radio remote stalk to get access, I can't remember.
You may find the wire has pinned out and is not touching the the terminal on the switch.
IIRC pin 10 is the reset button
Failing that it sounds like a faulty switch.