If anyone is having this problem or has had this problem i could sure use some help:banghead: After getting the ball joints done on my 2001 blazer the 4x4 quit working, :popcorn:first the auto shift light would blink and it would only go into 4 low but now even the lights quit working and the service four wheel drive light is on. anyone have any ideas about whats going on with it?

Welcome to AF.
Check wiring and plugins on front wheel speed sensors and front axel.

Is all fuses good?

You may need to get a transfer case capable scanner on it and check operation and get codes and post back code no.