ColeTrains'96Z28

Well afteri did my '97+ Camaro Taillight conversion yesterday i drove to town to get reverse bulbs and my ABS INOP light came on. So i drove it to work last night and then when i got off work it was off. Drove to walmart to pick up some wire roll for a buddy and when i almost got there(5 minutes from work) it was on again. Then last night leaving my buddies house it wasn't on the whole way home(5 minute drive)Any idea's guys. Maybe i bumped something under the dash when i was doing to coversion i don't know but when the light was on the ABS didn't work. I didn't try when it was off though. Thanks Guys~Cole~