Need help with new to me 2001 K3500 Dually- 4x4 wiring missing!

[tgrisko]

7 hours ago, davester said:

Maybe try getting the vin from the ecm using a code reader?

Thats a great idea....  I will have to do that for sure.   I have a reader, but I dont think I can do that with the one I have.   I'll have to bring it to A-Zone or Oreilly's to get it done.   

 

Trying to find wiring harnesses online is become a losing battle.... NO ONE carries the main harness...  I may have to get that alldatadiy subscription as you suggested....

 

 

[tgrisko]

9 hours ago, davester said:

Maybe try getting the vin from the ecm using a code reader?

Gonna have to do that for sure....  my hunt right now is trying to find detailed wiring diagrams/ schematics to nail down what I need as far as wiring harnesses... I know I am missing the Transfer Case Control Module ( TCCM) and the connections for it.  The TCCM connections come out of the main harness that connects the Distribution Block ( fuse block) under the hood, thru the firewall, to various parts inside the cab  This harness may have come from a 2wd donor... This is an assumption on my part... since there is no provisions for the TCCM connection in this harness.  The part number on this 2003 date coded harness ( 15204375 ) does not come up anywhere in my search.  I cannot even locate a part number for this harness for a 2001 online either.  My guess is I need the technical name of this harness to try and find it.  I am determined.  My best recourse of action at this point is to find a donor 03-07 25/3500 4x4 with this harness in tact with the TCCM and 4x4 switch from the dash.   I can't find any local yards with these exact parts... so the hunt continues.

 

Again... I appreciate the help with this.