If you are following the instructions on this thread, you will never have power at pin number 10 on the blower speed control. Number 10 is the ground and it is a brown wire and brown is always the ground. Power output is pin number 6 and the wire is green and red. I was following these instructions and wasted a bunch of time so I'm posting this to correct the information. Also, here is the link to the FSM wiring diagram.

https://www.startekinfo.com/StarTek/outside/12253/program/ETM/ACC83-85.pdf