Rats nest

[bobbo]

I was preping the car to install a wideband, PFC boost controller, PFC and Datalogit.
I pulled the ecu out and noticed a bit of electical tape so I pulled the plastic conduit off and this is what I found. I'm quite sure Nissan doesn't do work like this.
If anyone recognises any of the wires or can shed some light on what might be going on here I'd apprecaite it.
I'm going to trace the wires and see which ones are tampered with by refering to the manual.
Thanks for any input!

http://img.photobucket.com/albums/v150/tegguy/harness8.jpg
http://img.photobucket.com/albums/v150/tegguy/harness7.jpg
http://img.photobucket.com/albums/v150/tegguy/harness6.jpg
http://img.photobucket.com/albums/v150/tegguy/harness5.jpg
http://img.photobucket.com/albums/v150/tegguy/harness3.jpg
http://img.photobucket.com/albums/v150/tegguy/harness4.jpg
http://img.photobucket.com/albums/v150/tegguy/harness1.jpg

[mcfly]

that brown connector looking box is definitely factory. It looks like someone had installed then removed something in the past though.

Trace the weird looking wires back vs. pin out and you will likely know what they had hooked up.

[bobbo]

Apparently the heavier gauge wires are for additional insulation from RF interference for some of the more sensitive sensors.

I did trace the harness where it goes into the engine bay and couldn't find any evidence of tampering.

A couple of guys from GTRC said they had pulled theirs apart to reveal the same thing.

Most of the mess seems to be going into the "brown box" which is apparently a common ground block.

[bobbo]

This is some of the feed back from GTRC...

"Thats all oem. Your not the first person to think thats weird. When I was a young punk and seen that for the first time on my SR I completely tore it apart and soldered and heatshrinked the entire harness. That brown thing is for all the grounds and lots and lots of other wires split. the wires that are covered are things like o2 sensor, knock sensors. They have extra shielding to protect it from electrical interference or at least thats what I figure. Its the messy part of the harness and thats why they have that black plastic thing that you took off to expose all that mess cuz it wont fit in loom like you think it should. So you can put it all back and leave it or do what I did and waste a day or two soldering and shiz."

"its true i did that with my first r32 back in the day"