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Old 03-18-2008, 11:13 AM   #231
58mm of Bliss
PEI330Ci's Avatar
Join Date: Jul 2003
Location: PEI,Canada
Posts: 4,368
My Ride: 330i, 330Ci
This is the factory wiring harness laid out in my shop at the beginning of the thinning process:

When I removed the wiring harness from the vehicle, I labeled all the connectors to make this process easier. (I did miss to label about 6 connectors which took me a looong time to figure out later.) I would then cross check the wire colors and pin location at each control box to make sure I labeled the wires correctly. Through this process I caught 1 labeling mistake, and also made an assumption that cost me some time, but the mistake was fixed.

Here is a sample of a pair of wires that I've removed from the harness. Note that I've removed the pins from the connector to the control box:

Some more images of my progress:

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