Transfer case not working right

I am providing you with the wiring diagram for the four wheel drive actuation system. Near the bottom you will note the actuator motor and the transfer case encoder motor. You may have a short or bad ground in one of these components. Check wires for good fit and bare spots where insulation is missing and could cause a short. Also check all grounds for a tight corossion, rust, free fit that is metal to metal. I f all the wires seem good the actuator is the first things I would be suspect of.
Take the truck and have the trouble codes pulled. Any Advance Auto or Auto Zone will do this for free.
If no codes come up there is a mechanical problem that may be in the hubs. Take them off and clean and re-grease them while checking for broken or mal-functioning components.
The ECU may be at fault is all othere possibilities are eliminated, but this is unlikely. Check the ground for it as well as the main power wire.

What you need to check is to see if the 4wd actuator on the transfer case if getting power. If it is, chances are the actuator is bad. If there is no power, check for damaged wiring and the switch itself.

Check to see if there is power to the 4wd actuator on the transfer case.

Then you need to remove the actuator and check to see if it is working properly.

Sounds like a problem with the transfer, I feel that you will have to pull it out and dismantle the transfer and inspect for damage, drain oil first and check for any metal in the oil as well.

Check to see if oyoru solenoid is sticking or not workingthere is one on the t case and one ofn the axle.

Its usually caused by a faulty 4wd encoder motor. This is the electric motor on the side of the transfercase. Try tapping on it for a temporary fix. Hope this helps

It sounds like the system is not getting power. Lets check at fuse # 36 TCCM under the hood. Here are two guides and the transfer case wiring diagrams so you can see how the system works and the fuse location as well:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

and

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

Good to hear, please use 2CarPros anytime we are here to help.