There is no "slip-ring." There is a clockspring, but the turn signal wiring does not pass through it. The multifunction switch does have mechanical interaction with the rotation of the steering wheel. That's how the signal cancels itself when you make a turn. There's a good chance that something inside your multifunction switch has broken.
Slip-Ring, clock spring, what I mean not what I say!
So, my malfunction switch has.... malfunctioned.
All I know is one day I went to signal left and my right blinker came on. That was interesting. Normally I'll be sitting at a light and the blinker will stop blinking, but will start again if I move the steering wheel a little.
It's bomb filled with Jesus-springs and oh-no-clips