ok so i hooked up my blazer to a scanner and it pulled up these code meaning. left front speed sensor signal lost. right fron speed sensor signal open but erratic. and stop light switch and ABS cicut lost. which i pulled my ABS fuse out due to when i was going low speeds like 5mph-1-mph my abs would kick in and one time went to park and couldnt stop cause my ABS kicked in and i almost went over the curb.i replaced my right front hub like 2 weeks ago but didnt put my fuse back in cause my ABS kicks in. can my left front speed sensor be bad and causing my abs to kick in at low speeds. and why is my right front sensor signal erratic.????? need help.

 

All it takes is for 1 sensor to make the ABS kick in. As for the erratic signal I'd pull the tire, brakes off, take the ABS sensor out & check it out. On mine there were 5 very thin shims between the sensor & the hub. One of mine was also really full of crap & I had to clean it & blow out the inside of the hub where the reluctor wheel is.
Kyle has a write up on the procedure.
https://blazerforum.com/forum/tech-a...ment%5D-26941/

Also on my 2002 I needed an 18MM combination wrench for the upper caliper bolt. That & lots of a good quality penetrant like Sea Foam Creep works well.

 

i cleaned the left speed sensor and mounting surface really good the seal on the sensor was broke so i got one that was close enough to fit and it did but still low abs activation the right side is new and clean. half tempted to leave the abs fuse out and go without ABS. but i like ABS for winter and if i have to brake hard

 

The thread Tom linked to has test specs in it. Did you test the sensor output against those specs to see if they are reading correctly?