Hello trying to solve some eletrical gremlin now ...

My rear wiper stopped working (clicking noise) so I immediately pulled it out - dismantled it - cleaned it from rust, lubed and oiled, finally i give it a try on a spare battery, it runs great as that plastic wheel is all OK but i hardwired only that motor ...

So i put it back to car, connect all plugs but nothing, not even sound, no rear washer pump noise, no life at all

Pulled it out again and hard wired that wiper motor
- connected to own car battery runs ok
- connected to original connector - runs ok

so not working only if i connect all plugs to wiper motor and control unit, is that control unit dead? is there any way how to check it?

*fuses 41,80/10 are ok, front wipers and washers works fine, on original 3pin motor connector is solid +12V, ground is fine too

dismantled it again this evening as i've got no luck to find any spare wiper motor to try for 3 days ... is that magnet on the botom of that plastic wheel must be in any "precise" position?

thank you for any advice
happy new year! na zdraví