1996 4x4 not working

[Trav1984]

I tried searching and couldnt find anything specific, so i figured i would just ask. Just picked up a 1996 tahoe with push button 4x4, when you push 4hi or lo no lights come on, and no noises can be heard. I checked all the fuses. Last chevy had floor shift so im pretty clueless on where to start. Any help woulod be greatly appreciated. Thanks in advance.

 

[LI99HOE]

You said you checked the fuses...are they all good?
When you push 4hi/2hi do you feel it shift in/out?
You said you hear no noises when you push the shift buttons. I have a '99 w/the same setup. I can hear a click(ever so slight) from under the truck, and feel it lurch a little bit when it shifts. Originally the lights on the selector switch weren't working, but it was shifting in/out. Turned out to be bad solder connections in the switch not lighting up the correct mode light.

 

[Trav1984]

All of the fuses were good. 4x4 is not working at all, it doesnt even make a sound like its trying to work. The lights on the switch dont even flash when i first start it.

 

[Devious_Tahoe96]

My push button lights up when it wants too, but if you don't hear anything then it could be the actuator for the 4x4.

 

[LI99HOE]

I agree w/Devious...... if you don't hear/feel it switch, the actuator might be bad.
It's going to take some detective work with a Voltage meter to do some tests.
Check around on here (or Google) Travis, and see if you can find a schematic for the 4x4 system, or a good troubleshooting guide/procedure. I KNOW sum1's got one.

 

[Trav1984]

Could the switch just be bad? Anyone ever have it happen

 

[Trav1984]

Put my switch in a friends 96 silverado, and it lit up and worked perfectly. Would an actuator cause the lights on the switch not to work or could it be the harness. Im a noob when it comes to push and pray 4x4. Any input would be greatly appreciated. Thanks

 

[Devious_Tahoe96]

Could be a loose connection from the wire to where the harness connects to the switch....but my money is on the actuator though.

Here's a pic of what the actuator looks like
http://i615.photobucket.com/albums/tt240/raptorforme93/photo1-3.jpg

 

[Trav1984]

Thanks Devious. Are there two actuators on these? one for t-case, one for front diff?

 

[Trav1984]

Tried jumping the number 13 pin, and got nothing no lights at all, Would the actuator cause this. Or would it have to be the harness?