I put 1.5" spacers in the front and put the correct upper control arms. I also did brand new wheel bearings in the front. everything is hooked up and I don't see any damage to the wheel sensors. perhaps a faulty wheel bearing? the rear I did 3" blocks and proper shocks to accommodate. I don't see any obvious sings of broken wires and everything was fine prior to the install. I also installed brand new struts with new coil springs.