replaced blower brushes - smoke!!!

Hi all, hope you are having a good day, I have a bit of a PROBLEM!!!

98 S4

some time ago my blower packed up, was intermittent for a while then just stopped working, so after looking on here I reversed the brushes and all was fine till now.

I got the intermittent blower so assumed the brushes were gone again so I bought a new set took the motor our, replaced the old brushes with new ones, soldered them in and all and put the motor back int he car.
on tunring the ignition key and starting the engine I got no blow. thoguh this a bit odd as it is s imple job and everything was back in the right place.

I then saw a little bit of smoke and that burning smell. arrrgh what now!!!

so I took it out again (only just put the motor back in not the whole lot) and check to see if the motor would spin freely and it does, check the rubber mounts were seated in the plastic houseing correctly, they were.

checked the brushes were in the right way and were in right...they were

It is obviously getting powere but something is not working.

any ideas? Does the smoke that came out mean I ahve burnt the motor out? Was only a littlest bit is there any petrusions that can stop the motor spinning?

hopefully there is a simple fix for this.

any help appreciated