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I have been struggling with this battle as well... except I tried a different attempt and may or may not have had good results?I tapped the extra female brown/white switch control adapter to the spare brown/red through a small jumper.I also wired up an additional plug on the red and brown wire coming from the headlight control and have one going to the brown and red female (check for the right continuity first) and the other male plug going to the brown female plug in the headlight bucket.It seems to work except for blowing a bunch of 5amp tail light fuses. Couldn't seem to wrap my head around this one.Nonetheless, I still think you need to jump the female brown/red and brown/white spare plugs for the headlight to work as they are not tied in together like they should be. This was for my 1974cb750K what year did you use?Also, do you get continuity running from the brown/red to fuse block via the brown tail light cables, red power cables and anything else? I am but am still unsure of whether this is normal or not. I didn't on the old harness
I suppose I did. I'm going to re route it the way you have it and see how that helps. My goal was just to have the headlight work. It took a while to realize but the headlight power (brown/red) isn't tied into the headlight switch control (brown/white) on these harnesses as it should be. You manually have to do that yourself
I have also just come across this issue on my US K3.In comparison to the original harness, I find when connecting all EMGO harness headlight connectors, the following 4 wires are "left over". - brown/white, brown/red, brown, black.To further confuse issues, the Emgo main harness has two brown/red wires in the headlight, and these have white shrink collars on them?Are these white collars supposed to mean anything? Are they interchangeable as brown/white?
As there is only one brown/red wire from the left hand switch block, you have to choose which of the two brown/red harness wires to connect to - leaving the other one "left over"? Does it matter which one you choose?
From the above comments in this thread, are the following conclusions correct:1) I do Hondaman's "fix" and make a jumper to connect the "left over" black and brown wires, and then fix the fuses as recommended.2) As per DaveI, I also make another jumper to connect the "left over" brown/red to the "left over" brown/white to manually connect the headlight control to its power.I look forward to any advice on this, before I start testing with power - and possibly melting stuff!
Hi guys, I was reading through this post as I just rewired my cb750k3. I am new to the forum so not sure if a reply or starting a new thread is best??? I just want to confirm what I did is correct and the leftover wires are ok...My right hand switch has the start button and headlight on/off switch and the left side has the hi/lo switch. I assume I have the "emgo" harness as I also ended up with the leftover female black, brown, brown/white and brown/red connectors. I just bought it from cb750supply.Per the previous comments on this thread, I jumped the black to the brown and switched the 5 and 7 amp fuses around. Only the brown/white female remains leftover. Is that correct? The front running lights are now always on (i dont recall if that was the case before rewiring) regardless of whether or not the headlight is on and all lights and signals are operational.I also have a leftover red female flag type connector coming off the positive battery cable in between the positive battery post and the solenoid. Thick red from batt to solenoid, red/white are both connected but the thin red is free. Any information regarding this leftover red is greatly appreciated???Thank you, I wouldn't have gotten this far without you guys! - Vince
HM,Will this harness work with my 77 550F also? In it's previous life someone had installed a Vetter Windjammer among other things and chopped up the harness pretty good. I have since ditched the fairing and gone back to a standard headlight. I replaced the factory fuseblock with a blade type also. It's running now and most everything works. I have no HI/LO for the light, horn, or left turn indicator on the 'dash' but all running lights and signals work.Thinking about a rewire along with your upgrade ignition kit.Thanks,Rick
I had forgotten about this issue with the parts n more harness until I rode the K0 after dark the first time and noticed there isn't a taillight. LOL. It works in the park position which is rather curious. I added a 3 fuse block and a hot wire to the headlight bucket for future relays. I'll poke around in the headlight bucket tomorrow and see what I come up with.
i am about to tackle the harness in my 1978 750 k with a parts and more harness, does this info pertain to the 77-78 harness also? thanks
Hi there ! Can anyone help me with wiring issuses on my cb750 k2 Australia bike? I also have fitted a new parts n more harness and I am having problems with green wire to regulator. When key is in off position the wire is earthed but once I turn key on to start the wire comes alive . All other green wires remain earth except for the one on regulator which I believe runs to field coil ! Any help will be great as I am not that clued up on how this should work