Honda-SOHC
SOHC.co.uk Forums => CB750 => Topic started by: Underdog1 on June 29, 2018, 07:54:39 PM
-
Having a few snags with the headlight bucket electrics, the bike is a K6, the harness is an aftermarket one from Z1 parts for a K3-K5 but came with a little jumper cable to ft the K6 (as it doesn’t have an on/off headlight switch as stock) BUT I have repro switch gears which DO have the on off switch so I’m basically wiring the same as a stock K3-5.
I have an aftermarket speedo (with LED idiot lights) and an aftermarket tacho. Colours on the wires from these are all kinds of colours but I think I have hen figured out.
Currently all that’s working is an oil pressure light and the backlights for the gauges. Don’t currently have brakes or indicators on the bike.
Firstly is this right, it’s a teal/red wire which comes from the neutral switch, I’ve currently got it connected directly to the neutral light (other wire from neutral light has gone to black). Confusing as all the wiring diagrams show this wire as green/red not teal/red but looked at my old harness and that’s also teal/red
(https://s33.postimg.cc/rjxfkyhmn/751_ED7_FD-3166-47_E6-_AD8_A-0_B374571_A046.jpg)
Secondly I’m not sure where this black red wire goes, as far as I’m aware it comes from the starter switch. I’ve connected it to the brown / red wire here (headlight circuit), as that’s as best as I can work out from online wiring diagrams!
(https://s33.postimg.cc/d0qajjw7j/64_B7770_A-912_C-485_E-9_DE7-801_CB4_BB8_A82.jpg)
-
All i know is, if you get it wrong, the loom melts :o
-
I think the black red should feed power to the dip switch on the LH switch as in the original configuration the starter button turns the lights off when the button is pushed and at the same time powers the starter solenoid which is also wired opposite to earlier bikes which ground the solenoid power feed to the bars
-
I think the black red should feed power to the dip switch on the LH switch as in the original configuration the starter button turns the lights off when the button is pushed and at the same time powers the starter solenoid which is also wired opposite to earlier bikes which ground the solenoid power feed to the bars
The black and red is from the right hand control (looks like starter button), no black and red wire in the loom for it to go to, but there is 2x brown and red wires which go down to the headlight 7a fuse. The other brown/red wire in the loom I’ve connected to the headlight dimmer switch.
Still not getting much though!!
-
Just to clarify - the electrics should work when the key is in ignition position 1 right? (Once click clockwise), bikendoesnt have to be running for headlight horn etc
-
Just to clarify - the electrics should work when the key is in ignition position 1 right? (Once click clockwise), bikendoesnt have to be running for headlight horn etc
yep, and some 750's have the switch gear earth to the handle bars.
-
Just to clarify - the electrics should work when the key is in ignition position 1 right? (Once click clockwise), bikendoesnt have to be running for headlight horn etc
yep, and some 750's have the switch gear earth to the handle bars.
Literally have just read up on this, haven’t drilled my bars yet so I’ve had the switch gear just dangling, probably explains why at least some of the stuff isn’t working. Had a look through the electrics section of hondamans books and all the info is in there, just need to wrap my head around it!
-
The black red, I think, goes down to one side of the headlamp fuse and the other too the LH switch. Have you got a lights ON/OFF on the RH switch.
This is one of the very few occasions when wires do not go colour to colour
-
The black red, I think, goes down to one side of the headlamp fuse and the other too the LH switch. Have you got a lights ON/OFF on the RH switch.
This is one of the very few occasions when wires do not go colour to colour
Yeah I’ve got the on/off switch
-
Just to clarify - the electrics should work when the key is in ignition position 1 right? (Once click clockwise), bikendoesnt have to be running for headlight horn etc
yep, and some 750's have the switch gear earth to the handle bars.
Literally have just read up on this, haven’t drilled my bars yet so I’ve had the switch gear just dangling, probably explains why at least some of the stuff isn’t working. Had a look through the electrics section of hondamans books and all the info is in there, just need to wrap my head around it!
Hondaman's book will be a great help. Also a drawing of the logic module (K3-K5) (aka Safety module) on page V-7