Autohelm 4000 question

[junaido]

I have an autohelm 4000 which is not powering up. No red standby light or other signs of life.  There are 4 wires (red/black, blue/brown pairs) in the connector. I am assuming one of these pairs powers up the control box and the other one would presumably drive pulses to the motor which drives the wheel with a belt. I am not sure which pair is the power source or even if this is a correct assumption. I am seeing 12V on both pairs when I turn on the autohelm at the switch panel. Even without the control panel connected. The picture shows voltage on the blue/brown pair (wire is not connected to the board) and the polarity seems reversed (blue should be negative but is positive). A later probe showed 12V on the red/black pair as well. Anyone on this forum have the same unit? Any info on the wiring/troubleshooting? Thanks.

[junaido]

Pic

[Roland Gendreau]

Check this link:

https://www.sailnet.com/threads/autohelm-4000-wiring-question.253514/