It is possible to pop the end of the stalk off (while it is still mounted in the car) and then spray some contact cleaner; that may restore function.

You could also dig up a wiring diagram, figure out which pins of the relay mentioned above get the signal, and then test to see if that signal is getting to the relay from the stalk.

__________________
Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC