Pin 8 (-) ........ 13.10 - 14.10 volts (as the RMP increased and decreased)

Pin16 ............ 0.06 - 0.24 volts (as the RMP increased and decreased)

Not sure if this helps Richard, but I thought I'd try swapping the red and green wires around just in case. The result was exactly the same readings as above.

I also made a video. The lighting isn't the best but I hope it helps.

http://www.youtube.com/watch?v=9UeddFJE3tM