Hi, about to ask same question and saw yours.However, I bought a new stalk and went to replace tonight. New stalk has 9/10 wires and my 1969 van has only 5!! No instructions with new unit or in manuals. Any help/advice appreciated.
my stalk has nine wires but the bus only has eight so i used trial and error by joining the different wires together until i found the right combination. Not ideal but it worked. The other way would be to use a multimeter, not very expensive and cuts out all the guesswork.
If you got your stalk from VW Heritage then I have the wiring colour conversion chart that I can dig out - having installed my stalk last week on a 1970. However you will see a separate thread that I have posted with problems with the headlamps & full beam - still trying to resolve!!