my 99 4x4 blazer is having problems with abs. light is not on at start up. at first stop,on dry pavement. abs motor whirrs, and light comes on. then light stays on,,, brakes can then be used and locked up as needed. light stays on until you shut off vehicle,, then next start up ground hog day all over again. also check engine light on, obdll scanner says p0147 heat sensor bank 1 snsor 3 Go figure huh???? any relation to each other?? and of course the 4x4 is not locking in the front wheels for some reason. 3 big problems right now.. with 8 inches snow forcast in two days, wow, I am going to try the posts trouble shooting the4x4 tonight. any other help thanks

 

i have a 99 balzer also with yes the same problem. i have found this on the issue that may helpyou

http://www.ebearing.com/news2005/053101.htm