Update - I have thinned a great deal out of the chassis & dash harness and reinstalled it into the car. Total savings blew me away - 41lbs! It was a huge project unraveling the entire harness, labeling all connectors and pins, and trimming & untangling But totally worth it both in weight and simplification.
The car started up and had no issues other than a solid airbag light (no chime). I was able to entirely remove the wiring that runs down the driver side of the car, and the only things I had to re-route from that path was the shifter and YAW wiring, which I simply ran from the dash down the tunnel. I also re-routed the large power feed from rear fusebox to the driver kick panel area across the front of the firewall, vs around the trunk and down the driver side like stock. (this took out about 5ft of that 4GA cable).
Here is a basic breakdown of what is left by section of the car:
Rear - Trunk Harness (plate and reverse lights), Tail lights, REM
Mid-Rear - Fuel Pump, Rear Wheel Speed, 3rd Brake light & capacitor
Mid - YAW/Advance track, Shifter Housing
Mid-front(dash) - Message Center, FEM, Cluster, Passenger junction box, TCS switch, Headlight + Dimmer, Steering Column control, turn signal control.
Here is a basic breakdown of what came out:
All 4 door harnesses, All audio/nav/video/antenna, Elec Parking Brake module/switch/motor, Rear Park Assist, HVAC, Headliner/Roof harness, Defroster, Airbag wiring, all interior dome lighting functions, trunk & fuel poppers, power pedal wiring, seat harness wiring, seat belt wiring, excess power wiring and grounds, any associated fuses, relays, and power distribution. (joint connectors and merge points simplified).
I am now focused on testing circuits and functionality, and then cleaning up the wiring by looming & sleeving it. Next will be to break down the engine bay/front exterior harness, but there is less to gain there so I am not in a rush to do that. Maybe if/when the motor ever comes out that will give me cause to relocate the engine bay fuse box, and simplify the front end. I now have a ton of room behind the dash to house and simplify the design.
Looking into deleting the following still:
1 - ABS if I can get the ECU/Trans and speedo to stay happy. Ideally the function of ABS and solenoids will go away, allowing me to simply the line routing but retain speedo functionality
2 - Steering column motors. Looking into getting a custom light weight column with manual telescoping and a hub for after market wheel. The stock column weighs almost 20lbs and I dont think I have ever hit the switch. S197 could work maybe but I need something that will allow me to hook up to the LS intermediate shaft, and be strong enough for a manual R&P conversion I have planned.
3 - YAW sensor and TCS switch. I turn off TCS every time i start the car, not sure if just cutting these out will effect ABS/drivability. I suppose I could unplug and test drive.
4 - Wiper wiring, A/C, Power Steering, Washer Fluid, Fog lights, and assocaited power feeds that go to the front fuse box for things deleted.
5 - Custom switch panel exterior lights, message center, and turn signals. Wondering if I can bypass the dimmer switch and just keep cluster at 100% brightness