rear wiper won't work, tried the obvious, now just dumbfounded
 

the rear wiper,
1checked fuse good
put volt meter to the plug, closed hatch, got battery( or slightly less) voltage at plug with wiper on.
connected DC source to wiper motor, it turns and moves the wiper.
plug the regular plug into the wiper, and nada, not even my spare wiper motor will move, but under a battery chargers 12v it does!

WTF?