Why is the 4x4 not working on your Chevy Blazer 95?

Answer 1

most likely your 4x4 computer is out, yes your 4x4 has a computer under the passenger dash on 95 models, these are extremly common, 99 percent of the time i have these s10 blazers in for 4 wheel drive not working it is the 4x4 computer. If it's a push button unit the actuating motor on the transfer case is probably out. If it is a unit that has a floor shifter the vaccuume actuator on the front differential is probably out. If it's a push button unit, Pull out the button assembly from the dash .Seperate the button assembly. KEEP BUTTONS FACE DOWN AT ALL TIMES, Clean all of the 4WD/2WD button contacts with rubbing alcohol and q-tip. They are just like a computer keyboard.Also, Make sure that you clean the WHOLE surface of the switch board with the alcohol as well because there may be moisture or oxydation deposits that are shorting out a couple of traces on the board causing it to default to a certain setting. Make sure you keep the buttons face down for this procedure or else youll spend too much time picking them up and putting them back. During reassembly, make sure you align the LEDs to the holes. While you're at it, locate the transmission module. I have a 2001 Blazer and mine was located at the front passenger right kick panel. Unplug it and inspect the connector and pins. Mine was corroded on the power leads and a couple of others. After I cleaned the contacts and reconnected, it was amazing how much smoother the tranny shifted.