i just got my pulley installed about 2 weeks ago and just yesterday i got the dsc. flat tire, abs lights on. I know its the wheel speed sensor but do you think it has to do with them installing the pulley? maybe they didnt connect it back up or something...

 

Wheel speed sensor isn't touched during a pulley install. If it was disconnected (or inadvertently broken, the lights would have come on immediately.

 

Plus two weeks went by...They are unrelated.

 

I'm assuming you checked tire pressure?

 

It is possible if you mechanic unclipped the rt front wheel speed sensor from the holder that is right next to the bolt for the pass motor mount the wire can hang loose and rub on the crank pulley causing your light. We have MINI's all the time come in that "Just had ..... done and now the ABS light is on?" and we have found this wire rubbing.
Otherwise normally the ABS light and a pulley are not related.