ECU/Relay Box Relocate?

[07stalker]

Anybody relocate the ECU/Relay Box, on an 07' GT, back to the battery location on the passenger side corner of the firewall?
Anything particular to watch out for?

 

[Wicked One]

I have. The only advice I have for you is patience. Make sure you write down the colors if you have to extend them. I had to cut and solder close to 60. Take your time.

Good luck.

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[07stalker]

With the wires you had to extend, did you get a junk yard harness or just get the same gage/color from the electrical supply shop?

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[07stalker]

Wicked, do you have any pics of how you routed the harness under the hood? Got everything moved, now just need to clean my rats nest up!

 

[Wicked One]

The harness gets pulled back to the firewall. Underneath the battery there is a small opening , you have to make that larger. You are gonna have to lengthen about 70 or so wires. I had just over 60.

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[07stalker]

I re-fabbed the ECU bracket and bolted to the fire wall. Then put the relay box between the ECU and strut tower. I actuall went with two hole under the ECU/Relay box. The one harness I have to shorten is 81 wires and the one harness I need to add to run back up to the nose is 27 wires. Regardless of color match, I used panduit labels, 2 on every single wire! I do not want to be chasing an electrical issue at first fire with this TT setup.
Now that everything is moved closer to the firewall, what did you do with the huge mess of extra wire under the hood? Did you cut, shorten and solder all those as well?

 

[Wicked One]

My ecu is inside the fender, so all those wires are gone. Anthing that needed to be lengthened I did, and the excess I cut and shortened.

I would also get a pad and write down what colors you used for each connection. This way if there might be a problem, you can easily trace it.

Steps I did for each wire was:
Cut
Label
Write down color going to use and where it goes to
solder
test continuity and impedance
heat shrink
Repeat!!

Time consuming, but avoids any chance of a electrical failure, then again, I Love wiring, it makes me happy.

 

[07stalker]

Good news, I have the process down. Bad news, I hate wiring almost as much as body work
Much rather wrench on something! Thanks for the help.