Transfer case wiring harness

[RCarter3818]

Hey everyone, I've got an 03 Tahoe Z71 4x4 that I bought a little over a year ago. When I bought the truck the seller told me the 4wd doesn't work due to an electrical issue but the truck drove just fine in 2wd. So I brought it home and started diagnosing the problem and found the wiring going into the transfer case to be a cobbled up mess. So I started hunting for a complete new harness. After five failed attempts I finally found what I thought was the correct one and got the transfer case side plugged in and ran the wires into the engine compartment to the fuse box.

There's a 12 pin and a 3 pin connector by the fuse box that this harness plugs into but the connectors on the new harness are different. One of them is a 12 pin and all the wire colors match up as they should but instead of a 3 pin the new harness has a 6 pin connector. I'll include pictures. The 12 pin i can fix easily but I'm not sure what to do with the wiring from the 6 pin to the 3 pin. Any help would be greatly appreciated. Thank you

 

[Fless]

The simple answer is that the harness is not the correct one. What harness part number did you get, and can you tell what years it fits?

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

I cannot personally assist you with your issue, but other members of this Forum much more knowledgeable than me in this area will chime in.

 

[rockola1971]

If you are sure wiring is correct off the donor vehicle then just cut your 3 pin off your vehicle and put it in place of the 6 pin on the donor harness.