Without looking, I believe soft is clockwise, and hard counter. Around 21 clicks total. If the cable still works, you will notice a difference. Put it all the way one way, and the back will bounce up quick. All the way the
other way and it will come up slow. Hard is slow, lots of rebound damping. Soft is less rebound.
The cables are prone to failure over time, but any maintenance on them and they can last forever. Just dont drop the suspension out without removing the assembly! I know this and still did it a time or 2..lol.
Now one friends works well, the others does not turn so its either the shock adjuster or the cable. Feels like the shock end because he never ever turned in in 10 years. The one in the middle. And he can ride like hell! We rode skiroules in 1970...lol