Today i have talked with peterbilt,mawk industries about my harness conversion. Peterbilt was no help. Mawk ind. Ed was of course. Here is my problem the truck I bought is a 2007 with isx cummins and im wanting to build 6NZ C-15 to replace isx. The truck no longer has harness from firewall to engine ecm. So if anyone that has done this conversion please any info to help would be very nice.
