nightpoison
New Member
Ok, so I've done a bunch of research and have come across several articles that have helped me out, but I'm still not 100%, not that close either. Here’s the back story real fast. Picked up a CB750k4 with some wiring issues. Left hand controls (LHC) didn't work and the tach lights were dead. So I did some shopping and found some new equipment, LHC RHC Tach, Speedo. Indicator lights are now integrated with the DCC Speedo. The wiring harness was such a mess I ordered a new one from vintagecb750.com.
I wired up the bike and had four extra wires. well it seems that the new harnesses are a mixture of the UK and US bikes, so I need to bridge the brown and black wire that was left over and the brown/white with the brown/red that were left over. When I did that I got tack and speedo back lights lighting up, and then the brake light started to work as well. The Headlight would turn on only when I had the High Beam on.
So I took everything apart and I'm now starting over. The first time I made some educated guesses. This time I'm hoping I can make some informed choices.
the issues: no running lights at all, turn signals won't work at all, no low beam(running lights again, I think), starter/kill switch, and horn. So I've created a list of questions that I'm hoping I can get some help with.
1) Motion Pro start stop switch. (See attached photo of wiring diagram for right hand control)
A) ON/OFF SWITCH: does it matter which wires I connect this too? The motion pro has a black and blue/black. right now I'm running the black with the black/white on the harness & the blue/black to the black wire on the harness.
B) STARTER: there are two sets of wires that work the starter switch. for my bike I believe I only use one set of these. do I use the white & yellow or the gray & red/black combination? and which of those would I connect to the yellow/red & green/red wires to operate the starter?
2) Left hand controls.
A) Head light: so the headlight plug has three lines. Black (ground) Red (drive) green (pass). I came across another post where they said that the Black is ground, red is low beam, and green high beam. So I connected the red wire directly to the LHCs to the yellow low beam wire, and the green wire to the green High beam wire along with the Positive wire for the High beam indicator light. HL main wire from the LHC is Red and I’m connecting it to the Brown/red wire on the harness. the HB LED ground I'm running to a green ground.
B) turn signals: so I have dual filament signals for both front and back. the back I'm only using the ground wire and the flasher (positive) wire. as there are only single filament connections for the rear I just left it that way. Should I order a single filament or is this fine?
for the front. the red is the flasher (positive) wire which I connect to Orange (left) & light blue (right) on the harness. I also connect the LTS wire (brown) from the LHC to the orange harness wire & I connect the RTS wire (dark green) from the LHC to the light blue harness wire.
the Black/white wire is the ground which I run to the green harness wire for both the LT and RT front signals.
The last wire is black which is labeled as running light, which I run to the orange/white (left) & the light blue/white (right) on the harness. I don't connect anything else to the orange/white or light blue/white
Main turn signal wire on the LHC I run to the brown/white wire on the harness
is this correct?
C) Horn LHC pink wire connects to light green signal harness wire, and the horn ground from LHC (black) I connect to the black harness wire
correct?
sorry this is such a long desperate post. I was hoping to have the bike on the road last week.
I wired up the bike and had four extra wires. well it seems that the new harnesses are a mixture of the UK and US bikes, so I need to bridge the brown and black wire that was left over and the brown/white with the brown/red that were left over. When I did that I got tack and speedo back lights lighting up, and then the brake light started to work as well. The Headlight would turn on only when I had the High Beam on.
So I took everything apart and I'm now starting over. The first time I made some educated guesses. This time I'm hoping I can make some informed choices.
the issues: no running lights at all, turn signals won't work at all, no low beam(running lights again, I think), starter/kill switch, and horn. So I've created a list of questions that I'm hoping I can get some help with.
1) Motion Pro start stop switch. (See attached photo of wiring diagram for right hand control)
A) ON/OFF SWITCH: does it matter which wires I connect this too? The motion pro has a black and blue/black. right now I'm running the black with the black/white on the harness & the blue/black to the black wire on the harness.
B) STARTER: there are two sets of wires that work the starter switch. for my bike I believe I only use one set of these. do I use the white & yellow or the gray & red/black combination? and which of those would I connect to the yellow/red & green/red wires to operate the starter?
2) Left hand controls.
A) Head light: so the headlight plug has three lines. Black (ground) Red (drive) green (pass). I came across another post where they said that the Black is ground, red is low beam, and green high beam. So I connected the red wire directly to the LHCs to the yellow low beam wire, and the green wire to the green High beam wire along with the Positive wire for the High beam indicator light. HL main wire from the LHC is Red and I’m connecting it to the Brown/red wire on the harness. the HB LED ground I'm running to a green ground.
B) turn signals: so I have dual filament signals for both front and back. the back I'm only using the ground wire and the flasher (positive) wire. as there are only single filament connections for the rear I just left it that way. Should I order a single filament or is this fine?
for the front. the red is the flasher (positive) wire which I connect to Orange (left) & light blue (right) on the harness. I also connect the LTS wire (brown) from the LHC to the orange harness wire & I connect the RTS wire (dark green) from the LHC to the light blue harness wire.
the Black/white wire is the ground which I run to the green harness wire for both the LT and RT front signals.
The last wire is black which is labeled as running light, which I run to the orange/white (left) & the light blue/white (right) on the harness. I don't connect anything else to the orange/white or light blue/white
Main turn signal wire on the LHC I run to the brown/white wire on the harness
is this correct?
C) Horn LHC pink wire connects to light green signal harness wire, and the horn ground from LHC (black) I connect to the black harness wire
correct?
sorry this is such a long desperate post. I was hoping to have the bike on the road last week.