W123 300d rear pass side window motor
So i got the new regulator in place to now find window motor isnt working, worked intermitently right after install just enough to raise the window all the way up. i guess leaving the motor hanging for a couple of days damaged it or maybe there is some way to reset it??

I have a spair motor, does anyone know if i need to remove the regulator all the way to swap motors?
Thanks

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W123 1985 300TD naturally aspirated