The transfer case actuator keeps going out

Can we start with you providing the last 8 of your VIN?

This will confirm which transmission and transfer case you have.

Also, can you let me know how they are failing? Are there any codes when it fails? I suspect there is an open circuit code.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Clearly, we don't have an issue with the actuator but more than likely there is a short that is causing the actuator to fail. We need to be careful because if you take it back again, they are going to stop replacing them because they are going to figure out that there is something else causing these to fail.

Lastly when you say that the TCCM checks out. I assume you mean the Drivetrain Control Module so how did you prove this out as being okay?

I am attaching the wiring diagram below which is what we are going to need to prove out that there is a short.

Let's start with this info and go from there.

Thanks

The last 8 of the vin are AG169975.

It's a Canada truck. Now an AZ truck.

We put a power probe on it. Are all of the actuator motors did was made a small humming sound. It didn't move the gears at all. My friend tested the DCM and the wires with an ohm meter, it tested between 5.0 5.4 for the DCM and wires tested between 4.3 and 5.4. We did the same with the fuse box in the engine compartment.

Okay. If putting the actuator on it and it never worked, then we have a control issue.

Let's dig a little further into these voltage readings. What circuits are you on and where when you are getting these voltage readings?

Or were these ohm readings?

If the actuator doesn't do anything other than hum, I suspect this is due to the voltage not being correct so please take a look at the wiring diagram that I attached above and tell me what the voltage is on each wire when the engine is on and you putting it in 4WD.

Thanks