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I needed to create a new wiring harness for the bike. I had several upgrades/alterations in mind:
I also wanted to use the original Norton wiring color scheme as much as possible. I obtained the request wire, bullet connectors and sleeves from Britishwiring.com Jere is my attempt the diagram.  I first ran the wires on the bike in the approximate locations of everything. I left a lot of extra on each end and didn't terminate anything yet. It took several go rounds to make sure I had all the wires run in the routes I wanted. I also added some extra ground wires in for the headlight, head, frame and rear tail. Once I had the rough layout, I zip tied the thing together and removed it from the bike. I wrapped it in black harness tape and terminated with heat shrink. Then I remounted the loom on the frame and started cutting things to length and terminating. I slowly worked through the brake lights, head lights, indicator lights, turn signals (which took a while since I had to fabricate the mounts), and the ignition.
I forgot to take pics of when I wrapped it and installed it.
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Anybody into Commandos will tell you that the bike was apparently built around the horn. The stock location is deep in the center of the bike, difficult to get to - not the greatest place for a horn to make sound. My original horn ended up being bad, so I needed to replace it. Further the original Lucas horn was probably everything Lucas thought it should be, which as it turns out, is pretty much the same as how they designed and built everything. So I wanted to upgrade to a pair of Fiamm Freeway Blasters located in a more strategic position .I also needed a place to mount my new fuse block, the Fuzeblocks FZ-1. I decided to mount all this stuff aft the air cleaner, but in front of the battery. My first goal was to model the space in Fusion 360, so I could design a way to get everything located. Once I had that, I designed a sheet metal mount. It took about 5 iterations to get it to work. Once I had a design, I used Fusion's sheet metal tools to create an unfolded 1:1 plan of the part. I glued this to a piece of sheet metal, then cut and bent it along the lines. Once I had it bent up, I welded it together and painted it. Everything pretty much fit as I hoped it would.  Here's the thing partially wired. In order to mount it, I welded a could of pieces of angle to the battery tray and then attached some captive nuts to be used with some horizontal bolts to secure the horn mount (you can see a couple of slots in the picture above - bottom of the front rail). So the horn mount slips down on top of the rails and 4 bolts are inserted horizontally to secure it.   And here it is mounted up. I'm pretty happy with the way everything ended up. The horn relay is a bit cramped, but normally not a service item. Now on the the next part of the project - the wiring harness!
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