95 4x4 not working

ive got a 95 s10 extended cab..hen i hit the button, it blinks..i hear a click by glove box and nuthin..same for 4 low...was working fine a couple weeks ago.plz point me in derection to troubleshoot,,tks

There are tons and tons of threads on this topic already. Run a search and you will find all the answers you need. Good luck.