I have a 1999 Chevy s-10 Blazer 4x4 and I cannot put it in 4 wheel drive, the button on the dash is not lit up at all and nothing happens when I hit any of the 3 buttons, what's wrong???

Asked by Joe Feb 02, 2015 at 05:06 AM about the 1999 Chevrolet Blazer LT 4-Door 4WD

Question type: Maintenance & Repair

I know there is an actuator under the
battery, and a plug on the transmission but
I have no light on at all on the switch in the
cab on the dash

8 Answers


Those lights must work as they are part of the circuit, you might want to test the bulbs for continuity, if thier blown the 4X4 electronics won't activate.

2 people found this helpful.

2 wheel hi light stays on most of the time, when I hit a hard bump it goes off. When I push the 4 wheel hi, or low button it blinks then goes out..... Why???


Okay, the most common failure is the transfer case shift motor, try having someone push the 4X4 button as you lightly tap the motor witha small hammer or wrench, if the motor runs and the 4 WD engages then you found your problem, replace the motor assembly, if it don't run then you will have to test the 4 WD activation control box and the wiring. I have seen quite a number of these have broken wires in the harness at the shift motor. HTH

2 people found this helpful.

on hook the battery for 10 min, then try it it happend to mine and someone told about it and it worked

1 people found this helpful.

It's a fuse on the drivers Side interior same thing happened to mine


I had the same problem in my 2001 Chevrolet Blazer LT and I removed the switch and took it into my workshop and re-soldered all the contacts for the switches as they had cracks in them and after doing that all the switches work perfectly. Just be careful not to put too much heat into the switch contacts, all you should have to do is just touch them so they melt and touch them with a little solder when doing it. Be careful that the solder does not spread to other contacts.


It could be a simple fuse blown. Check and or replace the #15 10amp fuse on the driver side of your dash ( facing the driver door )... If not try replacing your 3 button 4x4 switch on your dash.

2 people found this helpful.

Check out the vacuum pump .my 03 $10. done simular and it was in the pump

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