ABS and SLIP lights lit up..

Okay, maybe this should go on the end of my alternator post but thought I would try it here first. Just took the truck out for a quick spin after installoing a remanufactured Alternator and cleaning the battery terminal connections. RUns like a banshee, better then it has in some time (maybe just in my head but it sure felt like it), anyway, turning down my street I noticed that the ABS and SLIP lights were lit up, pulled int he driveway, shut her off, restarted and they lit up again. At least they are not the Devil Red colored ones I have been seeeing the last three months or so on and off (BRAKE and the little battery light), they a re a calming Yellow.

Any Ideas??