Dread53

Anyone reading this has probably looked at the job done by Memphisstylee, which is sensational. There were a lot of questions about just exactly what was involved, and this has more 'during' shots to give you some idea of how I went about this. Also, I didn't relocate anything except the routing of the harnesses and I'm seriously **** about how many splices I put in any given wire, so I did most of them at the pin terminations. Anyway, follow along if you wish. I did this 3 years ago and have almost 25K miles on the car since, so it will live if done right.

First and foremost – Prepare! Second – take your time. If you’re in a hurry you will mess this up in a big way. Don’t even think about something like this without the wiring manual for your specific vehicle.

This is how I started, by going through the wiring manual and tracking every wire in the harness from end to end. I identified where splices were for common wires and planned which ones would need to be cut and rerouted. You need to know the pin location of every wire in every connector unless you just want to splice it downstream. I’m too **** to even think about that, but you can do it any way you think will live. The process I use for pinning the wire is illustrated below: You open to lower crimp on the connector and bend the wire back and forth until it creates a stress fracture at the crimp and breaks off clean. This is much cleaner than trying to cut it with snips. Insert the wire and crimp it at the lower crimp. THIS IS NOT A STRONG CRIMP, but it will hold the wire and give you a solid base for the soldered joint.



The next step is to label every connector and unwrap the harness. This is where you identify the wires that are separated into the transmission harness and run separately around the engine. These wires were long enough, after removing the IMRC wires, that I could rewrap and run them along the frame rail to the back of the engine.




I started to rewire at the coils and injectors. Every coil and injector has a separate signal wire and each bank of each system runs a common power wire. The photo shows how I spaced the wiring at the same intervals as the coils / injectors and bundled them towards the front of the engine. For those of you with a shift light, this is the place to add that sensing wire. I did mine after the fact and ran off #4 coil, into the transmission portion of the harness.



At this point I’ve reinstalled the blower with injectors and air tube to locate the fuel sensor, ETC and MAF. Those harnesses have been tied into everything else going across the front of the engine and tape wrapping is in place. I tape wrap everything the full length of the harness and then install convoluted tubing.



I’ve removed the air tube and finished this side of the harness. What you see is the complete harness for that side of the engine. I’ve also rerouted the harness that goes over the brake booster to under it. It is long enough to do that without cutting.



This mess where the tape ends is the driver side harness before it meets up with the passenger side. It includes everything around the throttle body and the alternator, with the exception of the main power lead. That I ran separately. The rest of the stuff draped over the valve cover is what’s coming out of the fuse box.



This is getting pretty close to complete, as the entire engine harness is now tied together and run to the frame rail. I’ve already split off everything going to the fuse box and have a lot of the harness back in the PCM plug at the bottom of the photo. The rest of these all go to the PCM.



These are the completed shots from both sides of the engine. Of note is the routing around the front of the cylinder head.




This is a pretty quick brush around a job that took me nine 12-16 hour days to complete, including the tubing, hose modifications and battery relocation. (See the Trunk Mount Battery thread) This was also specific to my Saleen blower, so other applications will vary, but it should give anyone considering this kind of project some insight into what will be involved.

As a final note, this is the wiring that was left over after I completed the project.

mustangpowers

nice post! this should be a sticky. why cant someone do this near philla lol i want to do it but im nervous

rony1976

Had to be done! After I saw your painted covers (and the fact you couldn't see anything because the wiring was in the way), it's nice to see you were able to do it. Looks super nice!

karman

Nice Post.
Great Job.
This stuff doesn't make me nervous,but this is what gets to me:
..."a job that took me nine 12-16 hour days to complete"
I don't like putting in more than 9 hours a day either.
P.S.
I can make it to Philly,but you can only imagine what I would have to charge you.
(Hint:$60 an hour X @125+hrs. =?)

69Mach1-409

Good Job!

Wish I had the time and patients to do this.