You may or may not have seen this sync video, but thought I'd drop it in here for you so you don't have to hunt it. Hope it helps. Good job on the harness! I'm going to put a low mile 1998 5.9 Magnum into my 88 D100, so I gotta figure all that out too. I have the complete wiring, computer and fuse box from under the hood of the 98 truck.