ok so heres the deal, my brake and abs lights come on every once in a while. ive already replaced the RWSS and that fixed it for awhile.:blahblah: then last month they wer on fairly frequently so i had my work scan the computer for the culprit. now my tuck doesnt have 4 wheel abs but when the mechanic scans it, it will only work if he selects 4 wheels abs. wtf?? :huh: