Electrical problems gtp 2001

I have a 2001 GTP limited Addition. I have a number of what I think are electrical proablems.
I had bad rotors on the front of the car so I went to have them turned. The repair shop said it could replace them for the same cost as having the old one turned. After installing them this is where the problems start. Now I have the ABS light on The Tacking light on and the air bag system light is on. I look up some information that said the rotors could be the problem but I went back to the old one and the problems still were there. I measured the resistance on the hub and both are the same. I'm looking for a good book on the car and help to see what I need to do next.