Alternator failed 2003 XC 70, replaced with non freewheeling pulley

[Blacklab467]

So my alternator failed yesterday on the way home from work and I got the "low battery" DTC and amber triangle, strange that I didn't get the red caption on the panel like last time it died? I checked the voltage at the battery and it was 11.6, then I checked it at the B+ terminal on the alternator and it was 11.6 as well.
I went to the auto wreckers this morning and pulled a good original that hadn't been remanufactured or anything. The only problem is that my alternator had a freewheeling pulley and the replacement either doesn't, or it does and its seized and no longer freewheels. I'm wondering if this will be a problem that I no longer have a freewheeling alternator? It's on now and appears to be working fine and pumping out 13.6 volts.
My plan is to get a new Bosch regulator and bearings and rebuild my old one and put it back on, Im wondering if the one I have on now will cause a problem?
Any ideas or advice?
Thanks.

[jonesg]

i think its the signal wire terminal, not the alternator itself, otherwise the red battery warning would be lit.
the windings are getting energized.

[ignatz]

My alternator clutch assy grenaded years back and was towed to my local Volvo guys. They installed a rebuilt alternator with a solid pully and said that I wouldn't have any problems. That 2001 V70 T5 got totaled by someone running a red light.

[Blacklab467]

i think its the signal wire terminal, not the alternator itself, otherwise the red battery warning would be lit.
the windings are getting energized.

Perhaps, I did take it apart a bit to inspect the brushes and slip rings and they are mint, I'm going to take it to an alternator shop this week and have it tested before I order parts for it and rebuild it. The field wire and terminal looked ok but I suppose it may not have been.