Mach 1 Electrical Question
Posted: Sat Nov 28, 2020 8:26 pm
Hi All,
Let me preface this by saying I bought the bike as a basket case, and the harness and headlight were purchased separately. It isn't shown in the photos, but please keep in mind that the wires coming out of the headlight are cut, and not connected to the harness, but the harness is complete(ish) with bullet connectors that will eventually get routed and connected into the headlight. I'm going through the electrical at the moment and most of it is making sense so far. There is just one area I can't figure out.
The white wire comes out of the harness near the coil and has an eye terminal just as you would expect based on the wiring diagram. A black wire also comes out near the coil, and the other end goes to the headlight end of the harness:
Based on the wiring diagram the black wire at the coil should go to the points, not the headlight (top left, I drew a red arrow):
In the headlight, there is one wire that doesn't show up on the wiring diagram (fourth from the left, circled in red):
My (probably incorrect) theory is that at some point Ducati started routing the wire from the points through the headlight terminal block and back to the coil. On the wiring diagram there is one spot that is open on the headlight terminal block, but it has a wire connected to it in mine. This theory kinda falls apart though because that terminal location has a wire connected to the back side that seems to go up toward the switches.
Any ideas what I'm missing? I could just wire it like the wiring diagram, but I don't want to mess with the harness if it is right, and what is that last wire in the headlight terminal block that doesn't show up on the wiring diagram?
Thanks for any help!
Jim
Let me preface this by saying I bought the bike as a basket case, and the harness and headlight were purchased separately. It isn't shown in the photos, but please keep in mind that the wires coming out of the headlight are cut, and not connected to the harness, but the harness is complete(ish) with bullet connectors that will eventually get routed and connected into the headlight. I'm going through the electrical at the moment and most of it is making sense so far. There is just one area I can't figure out.
The white wire comes out of the harness near the coil and has an eye terminal just as you would expect based on the wiring diagram. A black wire also comes out near the coil, and the other end goes to the headlight end of the harness:
Based on the wiring diagram the black wire at the coil should go to the points, not the headlight (top left, I drew a red arrow):
In the headlight, there is one wire that doesn't show up on the wiring diagram (fourth from the left, circled in red):
My (probably incorrect) theory is that at some point Ducati started routing the wire from the points through the headlight terminal block and back to the coil. On the wiring diagram there is one spot that is open on the headlight terminal block, but it has a wire connected to it in mine. This theory kinda falls apart though because that terminal location has a wire connected to the back side that seems to go up toward the switches.
Any ideas what I'm missing? I could just wire it like the wiring diagram, but I don't want to mess with the harness if it is right, and what is that last wire in the headlight terminal block that doesn't show up on the wiring diagram?
Thanks for any help!
Jim