ceisen
New Member
I'm having troubles figuring out exactly how to wire up the ignition on my 79' cb750k. I've exhausted the internet and haven't been able to find a forum thread or wiring diagram that has gotten far enough to break down what I'm looking for.
The basics:
1979 CB750K
M-Unit Blue
Revival Cycles starter solenoid w/ main fuse
Simple enough right?
My problems:
I'm using the stock ignition key switch BUT don't know what the wire inputs are on it, it was already taken apart and there was no connector on the wiring harness. All the wiring diagrams I've looked at don't give any clue (as far as I can deduce) as to which wire goes to which male spade. It's a 5 pin connector which I have represented in the wiring diagram below. Ideally (as with every bike) I'd like the key to initiate power to the m-unit so I figured that power would have to run from the starter solenoid or m-unit battery terminal to the key switch then to the lock input?
All my inputs and outputs for lights, brake lever/pedal, aux lights are working on the m-unit (if i connect the battery directly to the m-unit and a wire from there to the 'lock' input). So I didn't bother including them in the diagram below.
I thought I was making some progress when I had the ignition side of things hooked up but as soon as there was power to the m-unit and the kill switch was moved from "stop" to "run" the starter motor immediately kicked on. So I decided to remove all inputs and outputs and seek some help in fear of creating a toaster.
As far as I can tell the important wires from the hand controls are Black, Black/White, and Yellow/Red?
The only other outstanding wires that I don't know about are the black wire from the reg/rec, the light green from the pulse gen (I know it's the neutral indicator but can't figure out for the life of me where to route it to) and the black wire from the pulse gen.
Any help would be appreciated, or just shove in the right direction. I can't quite wrap my head around the rationality of wiring circuits
Cheers!
It's getting close...ish
The basics:
1979 CB750K
M-Unit Blue
Revival Cycles starter solenoid w/ main fuse
Simple enough right?
My problems:
I'm using the stock ignition key switch BUT don't know what the wire inputs are on it, it was already taken apart and there was no connector on the wiring harness. All the wiring diagrams I've looked at don't give any clue (as far as I can deduce) as to which wire goes to which male spade. It's a 5 pin connector which I have represented in the wiring diagram below. Ideally (as with every bike) I'd like the key to initiate power to the m-unit so I figured that power would have to run from the starter solenoid or m-unit battery terminal to the key switch then to the lock input?
All my inputs and outputs for lights, brake lever/pedal, aux lights are working on the m-unit (if i connect the battery directly to the m-unit and a wire from there to the 'lock' input). So I didn't bother including them in the diagram below.
I thought I was making some progress when I had the ignition side of things hooked up but as soon as there was power to the m-unit and the kill switch was moved from "stop" to "run" the starter motor immediately kicked on. So I decided to remove all inputs and outputs and seek some help in fear of creating a toaster.
As far as I can tell the important wires from the hand controls are Black, Black/White, and Yellow/Red?
The only other outstanding wires that I don't know about are the black wire from the reg/rec, the light green from the pulse gen (I know it's the neutral indicator but can't figure out for the life of me where to route it to) and the black wire from the pulse gen.
Any help would be appreciated, or just shove in the right direction. I can't quite wrap my head around the rationality of wiring circuits
Cheers!
It's getting close...ish