Did all 4 struts on my camry did the front first then the next weekend did the back after doing the back my abs light came on. today I went and check all 4 sensors no damage or broken wires I clean all of them and still the light on. I call a shop to ask about scanning for abs code but they want $89. so any idea what I can check for next with out scanning it and can I check the sensor with a VOM. Thanks