4wd actuator

[fxnytro17]

Hey,

Was stuck in 4wd for a few weeks, was driving the truck for work. Finally ordered an actuator as a shot in the dark without actually looking into it.
So I replaced the old one and still had the service 4wd message. No CEL. Nothing working. Still says I’m in 4x4 for a second before reminding me to service the 4wd. Anyways, reset it with a scanner and message pops back up.
I opened the old one in the meantime and it’s 100% burned out. So, my question is ajybody have this same issue? I’m thinking I have a wire burned somewhere in the harness or Tipm. But I haven’t had the chance to look yet. I still have to find out if it’s sending 12v or not as well.

 

[jws123]

Un hook the battery and touch 2 terminals together for a while let everything go dead/reset.

 

[fxnytro17]

No such luck.

I’m after looking at most of the wiring I can visually see nothing seems out of ordinary.

With the experience of my last truck I dived right into the Tipm. Nothing found there either. Practically new.
Either way I cleaned it all with contact cleaner and reinstalled.

12+ volts getting to the plug and board on the actuator.(I had the actuator apart thinking it might be a bad part) only 4 volts on the positioning power wire, I did a lot of reading today and isn’t there suppose to be 5 volts?

Also to ground goes to 32 ohms. So maybe a ground issue as well

I’m stumped

 

[fxnytro17]

So, I did find a nice troubleshoot for the dtcm, which everything turned out to be as it should.
So, i went back to the FAD connector again just looking at it and tested resistance between the fused and the ground and there ya go. 65 ohms. So I have a short somewhere. Which is why my last actuator must’ve burned out. Either that it burned a wire and caused a short instead of a fuse going. This is going to be interesting. I just hauled back as far as the wheel liner and all looks good there.