DIY 94-97 to 98-99 Patch Harness Parts

[prop7459]

You guys are right about buying these connects in bulk quantity but here are two sites that has the male connector in stock.
Male ECU connector:

1. Master Distributors - Over 300,000 Electronic Components In Stock! (requires $35 purchase)
2. Electronic Component Distributor | Onlinecomponents.com (requires $35 purchase)

[Tiberius]

FYI this is one of the harnesses I built:

This one is Gen1 only, hence the missing plug. The last one I built was Gen1 and Gen2-Hybrid.
All the important sensor wires are coded in colors mostly compatible to the colors used on Apexi S-AFC and AVC-R the rest is white.
As you can see I did't cast the male housing in epoxy like boomslang does. I failed at making a mold and found it's not really nessecary as long as you don't pull hard on the wires. Everything is insulated with shrink-tubing instead with alle the sensors wires having additional pieces of unshrunk shrink-tubing for convinience.

[NOMIEZVR4]

Is anyone going to be doing a write up on this anytime soon??...

I have a writeup in the works myself, I just have to finish the job before I post it..lol

[prop7459]

Hey your write up will be huge contribution to making the conversion harness more available to the diy crowd.

[Tiberius]

Whats there to write up? Get the parts, get some wire, cut it in pieces, solder one end to the recaptable, isolate with shrink tubing, crimp a connector to the other, put connector into plug housing, repeat for all other terminals.

If you're asking what wire to put on which terminal for an ECU swap, I can't help you with that. All I've ever done was straight through adapters to hook up piggy-back units to.
But you can find the ECU terminal lists for all models on stealth316.com this should be enough.

[lawdogg]

Awesome thread. I'm doing this to run my 94 ECU in my 92 wiring harness. This gives me all the missing info I needed!

[Tiberius]

Everyone who wants to swap ECU's between 2-bolt and 4-block engines with the different CAS need to read this:
Jeff Lucius on CAS conversion

just a reminder that doing the wiring is not the only job when you're swapping ECU's...

[jba3]

I'm not sure that there is more than a couple 98/99s out there, and I'm not sure the non-3S ECUs will be sold as a modified ECU without the adapter harness. But, this is still good info, especially for making your own pass-through harness.

[prop7459]

I understand that there are a few 98/99 ECU's to grab from but right now you can get a 98/99 ECU for $726 off of trademotion. If you compare the cost of getting an Emanage Ultimate, ACR2, and AEM, buying a new ECU is not that expensive.

[Tiberius]

Also when you want to go fully programmable and make it plug&play on the OEM harness. There may be the day that you want to put the OEM ECU back in the car and then a hacked up harness will be seriously annoying.