if I remember right these are each keyed differently so double check me, but make sure you aren't putting the pad sensor in the abs plug & vise versa

Ya, I made sure everything is plugged in correctly, ABS outboard and pad wear inboard.
Only corner I could think it would be is the left rear carrier that broke, found the left rear rebuild kit 986-612-953-01
And a possibly ohm reading of 1.6-1.8. Hopefully this will get me closer to seeing what the issue is.
Thank You

Also found a diagnosis/troubleshooting PDF.
http://www.steinbock.cl/wp-content/uploads/2015/05/8-Manual-Diagn%C3%B3stico-y-Soluci%C3%B3n-Frenos-ABS-PORSCHE-Boxter.pdf

Check all the sensors with a ohm meter and they’re all working fine. I looked closer at the plug where the hub carrier broke and the wire just beyond the harness connector looks a little deformed and not perfectly round like the rest of the harness. Wondering if the wires got pinched.

The Durametric Pro rental arrived and here's what the ABS 5.7 fault code said:
4216 Rear left spped sensor - signal implausible
4216 Rear left speed sensor - op. circ/GND/+ short

Thinking maybe buy the harness repair kit for $90 and switching it out.
Can't find a how to video online. I don't know if there's a junction box or something in the trunk that the harness goes to.

Looks like it's part of the trunk harness. Do you need a trace of what connector and pin that goes to?
https://live.staticflickr.com/647/31...4bb9e297_c.jpg

I could probably de-pin those wires from the connector on one of my scrap harnesses and send it to AZ if that's what you want.

Thank you so much for the diagram, only have my phone for now but it looks like the left rear after the fender well grommet there’s a plug. I’m thinking the repair harness would go up to that plug.
A weird thing that happened is in the Durametric under ABS 5.7 activations, there’s a ABS warning light. When I click start the spoiler goes up. Don’t know why that’s happening.
Then with the car running and go into the ABS fault code or now shows 3 codes.
4241 Control module fault and replace complete hydraulic unit.
4215 same as when car not running.
4607 Control module fault.
I took it for a quick spin and now those fault codes are gone when the car is running.
When. Testing the ABS, both front tires are still locking up when slamming on the brakes.

That would be great if you were able to do that, just let me know how much plus shipping.
I didn’t see the 2nd part of your post as it was after the photo of the harness.
I do think a wire is pinched in the harness.

Jasper,
Congratulations on your through troubleshooting steps, it seems that you are getting your car back where it was before the accident one step at the time, these are great news! :)

I found a rear harness that was already removed from the car and pulled the extra wires from the plug. I'll message you with payment info if you want it. The left side connector does have a partial crack as pictured. I melted the crack back together and it should function fine. I still have another one that I can get off a parts car, but may not have time to do it until next week.

Here's what I'll send. Wiring for both brakes including the yellow plug for reference of where the wires go.
https://live.staticflickr.com/65535/...e1249432_c.jpg

I used a small metal tube (handle section from a broken inspection mirror) to remove the pins from the plug. I'll include it. I think that a small coffee straw might work too. Push it in around the pin, pull the wire out the back.
https://live.staticflickr.com/65535/...5f6fd566_c.jpg

Here's the cracked part of the connector, melted back together.
https://live.staticflickr.com/65535/...00ee69a7_c.jpg

Thank you very much, looking forward to seeing if the cable is the issue.