[AMSAT-BB] G5500 Problem Diagnosis

I've done a few more diagnostics to try and determine why my AZ rotor suddenly stopped working. Here is what I've learned:

Voltage between terminals 4 & 6 and 5 &6 is 30 volts with the switch activated so that suggests voltage should be getting to the rotor from the control box.

Checking resistance at the controller terminals 4 to 5 shows 8 ohms as it should There is no resistance shown between terminals 4 to 6 or 5 to 6 and I believe that should shw 4 ohms.

So now I'm stumped. Could the problem be in the rotor connector or in the rotor itself? Any thoughts from the group. I'd like to get this repaired before the snow flies!

Rick, W2JAZ