'03 to '05+ pcm swap need help

[Matthew Denny]

Hello, new to this forum stuff lol. I know this has been probably asked a million times but what exactly is changed on the '03 harness for the '05 pcm? Is it just wiring the tcm in? I was going to take it out and send it off to Hotwire but the connector with the bolt holding it together to the cab harness is completely rusted away. Any help or diagrams/ photos would be appreciated. Or if anyone has an already modified '03 harness that they would like to sell would be great.

 

[MoparProud]

Why do you want to do this?

 

[Matthew Denny]

To be able to tune better and run a bigger cam

 

[MoparProud]

For some reason I thought I saw diesel

 

[Matthew Denny]

Sorry meant to clarify lol. 5.7 HEMI 4x4

 

[HemiLonestar]

It's not just the TCM wiring, there are pins that need to be relocated, if I remember correctly the plug is different plus a pair of O2 sensor pigtails have to be added (03 has 1 cat, 04+ have 2). It all has go come out and apart regardless, but especially if you were planning to send it out. FYI if you're gonna send it to Chris then it would be a good time to ask for the coil pack connectors to be changed so you don't need adapters to run the newer style coils.

 

[Matthew Denny]

Yeah I found a donor truck at local scrap yard exact same opinions and year as mine but the main plug where it splits to the cab and fuse box, the bolt in the connector is completely rusted out and just a nub lol. But they said if I pull it it's $35