I did know one thing about starting a new wiring harness, I need to make a wiring diagram as I went along. I looked into a few programs designed for wiring diagrams and such but they where all crazy complicated and had high learning curves. I just used Adobe Illustrator. You could do a harness without a diagram but I would suggest NOT. It is so easy to get lost and if you make one you have a reference for down the road. It sucks to make, but worth it. As mentioned before, the work you will see in these diagrams makes for lame blog pics but believe me, took huge hours. And as I went along I kept updating it so the one below is iteration #10. One aspect I wanted was to try and keep the harness for the M130 and the PDM15 as separate as possible. I think there are only three points that they share and those have plugs so they can be separated. I also various charts to keep track of sensors used, pins on M130/PDM they go to, wire gauge they use, etc. This will also be helpful down the road to figure out any issues. The only thing it does not show is the CanBus circuit. I have a separate diagram for that to keep things clean. If want to see it, let me know. Again, take the time to do this, it was beyond helpful as I made the harness. And insures when you turn the key to "on" that first time to have not made a big ball of fire.