It appears that the only things that changed was the move and a splice.
I second the question of "how did you shorten the cable?".
Cutting a section out from between the plug at the end and the anemometer at the other end and then splicing the ends together matching color-to-color would have been my choice. Maybe you need to re-check the splice and insure no loose wire strands, etc.,? Triple check the plug-in.
Did the anemometer possibly get bumped while the move was being made?
If the reed switch goes bad you get zero wind speed, I believe.
I would be very suspicious of the connections/splices...
Best wishes,
Ed