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At this time, the neutral switch is the last electrical gremlin I need to solve. I disconnected the wire yesterday and neutral light goes out. Starter does not turn over unless the clutch is depressed. Ground the wire to the frame and neutral light comes on and starter works. I ordered a new...

I think that it would be a 5 minute job. Famous last words though.

I think I read the same thing on another forum. I also read that the switch can be pulled without draining the oil. I found a brand new switch for $50. I'm going to remove the wire and test the light with by grounding directly to the frame. If the light goes off when not grounded and comes on...

Interesting Maritime. I still have the incandescent bulb. I didn't do the motor, but a real professional did. One of the best in the business so I think he would've checked it. I think that I can tell if the switch is working with a mulitmeter. I understand it is just making ground when in...

Thank you everyone for the suggestions and help. Worked on the bike yesterday afternoon and got almost everything working properly. I'm not sure exactly what the issue was, but I did get it solved. My best guess is that I was back feeding power through the tail light circuit from the fuse box...

I unplugged all the headlights, tail lights brake lights and turn signals and still getting unkeyed power to the black wires. This narrows things down quite a bit. I'll keep checking circuit by circuit and should find it somewhere. Not too many places left to check. Did I mention that I hate...

Hmm. I'll check the ignition switch tonight. I have not done that yet. Also, I have LED tail lights and and I read on another forum that LED lights can back feed. Have you heard of this before? I also have an LED headlight that is wired to a plug but not plugged in yet. Do you think this will...

It's not the diode. I unplugged all the black wires in the headlight bucket. Still a problem. I also unplugged the black wire from the rectifier as well. Also didn't work. I'll work on it again tomorrow but I don't think this is going to be an easy fix.

the one for the 1977/78. It has a diode and I assume the diode is working because the signal lights flash. I have the diode from the original harness that I can plug in to see and I think you can test with a multimeter. I will test the diode tonight. Thanks for so much information. I really...

Starter motor safety switch? I have a neutral switch and a clutch switch. Not sure about a starter motor safety switch. Come to think about it, when I turned over the starter to prime the oil pump, I had the bike in neutral, but the clutch safety wasn't wired yet. Starter still turned over...

Maritime. I will check that diagram with the ones I am using at home. I have one from an internet source and the other I'm using the Haines manual.

I bought the harness from 4 into 1. Yes it is the upgraded regulator/ rectifier also from 4 into 1. That didn't come with any instructions. Does anyone have a diagram that is modified for this hook up? It was pretty straight forward to hook up, plug into the harness plug and I think 2 extra...

So far

Before

I bought the harness.

That would be a black one right?

Hello Everyone. New to the forum and I need some help with a wiring issue. Not sure what to search to find out if it's been discussed before and I hope someone can point me in the right direction. I am building a 1977 CB750K basically from a junker. I swapped a 750F front triple tree and rear...