4wd Not working

[lancemanly424]

A couple months ago the lights on the drivetrain buttons were flickering from 2wd to 4 high and 4 lo. Now the lights are completely off and I no longer have any kind of 4wd available. Other related wiring shorts may be the radio, the radio will sometimes get real loud then when it peaks it will play at the lowest volume possible. When I try to turn the volume up it goes to completely nothing. If I mess with ti for 20 minutes I can get it reset itself. Any ideas of where these problems could come from?

---------- Post added at 07:17 PM ---------- Previous post was at 07:00 PM ----------

Oh and i have 96 Yukon 4door SLE

 

[RedCrush]

Electric push button? Can you hear it changing in low 4 wd? If so... Its the front actuator on the diff...

 

[SunlitComet]

I say something is agoof with your main harness in the dash.

---------- Post added at 05:35 PM ---------- Previous post was at 05:34 PM ----------

If you are still interested in the help.

 

[lancemanly424]

Ya I heard it going off the first night it was blinking. It did that for about 10 minutes after the car was shut off. I'm assuming I would need to replace the actuator then?
And ya I still do need to check the wiring harness, the battery hasn't died lately or anything. Whenever I get a new head unit( I have stock) me and a friend are gonna check all the wiring.
Thanks guys, I really appreciate it!

 

[SunlitComet]

Again, what was running after you shut the vehicle off?

 

[lancemanly424]

I have no idea. It was late at night and I had just gotten home from work so I didn't get to look into it,but it sounded like something was trying to adjust itself into place. Hydraulic noise then click then it'd do it over and over. It sounded like it was underneath the driver side.

Sent from my Desire HD using Tapatalk 2

 

[SunlitComet]

Make sure vehicle is in 2wd then shut off. Unplug t-case shifter and see if noise goes away?