Topic: correct turn signal/running lights wiring?

[setdog]

Hello,

Ive been trying to figure out a problem Ive been having with my indicator lights. 
My vin plate says 11/74.  and to the best of my knowledge this makes my bike a CB750 K5.

Ive been having a charging problem and wracking my brain. 

short version, my turn signals have two wires each. 
front Left, has two black wires, one has a orange ring, the other has a orange and white ring.
right right has two black wires, one has a blue ring, the other has a blue and white ring.

now, accoring to the supplemental diagram in the manual, both the k4 and the k5 diagram show 3 wire from the front turn signals,
same two i mentioned, but in the diagram there is a third wire, a gray wire, for both left and right turn signals. 

So, do i have the wrong the signals on my bike and might this be why my rear signals do not run?  they blink, but they do not illuminate steadily. 

[Xnavylfr]

The answers to both is YES.
Those would be incorrect for your bike model .
The original lights had  a double filament bulb. If the lights you have are double filament bulbs they can be made to work by attaching a separate wire from the light to ground.  You can test  by first making sure they have 2 filaments, then hook a battery charger ground clip to the stem then touch the other wires separate. The brighter lighter will be turn signal and other is running light.. Your turn signal light wires in the headlight bucket will be Lt Blue and Orange and the running lights hooks to a brown wire.


Xnavylfr(CHUCK)

[Sprocket75]

I am working on this exact same issue right now.

[setdog]

based on my brief google searches this appears to be a common issue.  since the information i just mentioned comes from the supplemental wire diagram (page 224) at the end of the manual, what are the chances most suppliers are using the main wiring diagram (page 172) and lots of us have been offered the incorrect signals?

the diagram on page 172 shows only 2wires from the front bulbs, not 3, as can be found in the supplemental diagram.

ps.  if nothing else, this gives me a great excuse to hit the cycle shop!

[CR125Honda]

Went through that same thought process a while back.

Look in side the headlight bucket. Connected to the bolts that attach the bucket to the ears is a green wire.
There's the mysterious third wire..

Ken

[TwoTired]

my bike a CB750 K5.

Ive been having a charging problem and wracking my brain. 

short version, my turn signals have two wires each. 
front Left, has two black wires, one has a orange ring, the other has a orange and white ring.
right right has two black wires, one has a blue ring, the other has a blue and white ring.

now, according to the supplemental diagram in the manual, both the k4 and the k5 diagram show 3 wire from the front turn signals,

It is a schematic representation showing three connections or electrical pathways.  The base of the bulb is an electrical connection and it attaches to the signal housing.  This connection leads to the headlight mount and inside the headlight housing should be a mount nut/washer with green wires attached from the wire harness.  That is your third connection, and is required to pass current through bulb filaments.

The left bar control switch, routes power to the front run filaments.  LB/W and O/W,  They get power from the Br/W, until the turn switch is operated, then the run light power is interrupted and power is routed from the grey wire to either the O or LB wire witch powers the flash filament. 

same two i mentioned, but in the diagram there is a third wire, a gray wire, for both left and right turn signals. 

The grey wire gets power from the flasher unit mid section of bike.

So, do i have the wrong the signals on my bike and might this be why my rear signals do not run?  they blink, but they do not illuminate steadily.

The rear signals are single filament and are only turn signals.  Many states specify rear turn signals can be amber, but rear run lights must always be red.  Are your lenses red?  I do have a bike so modified.

It appears you have the correct equipment on your bike.  But, I don't see what it has to do with a charging problem.

[setdog]

when i look at the supplemental diagram, i find a green wire, with female lead next to the winker relay.  the relay has two prongs, black and gray wire, theres a green wire there but its not attached.  wonder if were thinking of the same thing.

[setdog]

twotired,

this all started because my batt was too low to start my bike after a short ride.  the turn signals had not worked properly at the time.  i dont ride at night, (yet), so i never rode with lights on.  and my blinkers never really worked properly.  left turn wouldnt work, right turn wouldnt work.  then left turn would work front only. or right only, then 3 lights, or no lights.

now i got left turn (fr n rear) working and right turn (fr n rear) working but only the front bulbs stay on (run).

anyway, i tore it up a bit, and found left front with a single fil bulb, right front with a double fil bulb.  so i assumed this is where the power was being drained and I could be WAYYYY off but thats me learning slowly.

now i have at least the correct bulbs in the front and rear.  and this has led me to where i am atm.  trying to figure out if i have the correct wiring.  2 or 3, with my two front signals both running and blinking but the two rear blink, yet dont run.  (when i say run i mean stay on)  and yes they are amber.

i wondered if they should run, and i think they should, but i do not know for certain.

the connection you refer to, i believe is the small wire, that i thought was a ground, and is screwed to the small socket.  if this is the gray wire, its not represented in either of the diagrams.  therefore, im wondering if my wiring is correct according to diagram.

make sense?, i hope so, because its confusing me.

[CR125Honda]

Are you sure the supplemental diagram in the manual reads gray. It's green for my 74.

Ken

[CR125Honda]

now i got left turn (fr n rear) working and right turn (fr n rear) working but only the front bulbs stay on (run).

That's normal operation. The front two stay on as running lights. I can turn them off on my 74 with the light switch by the throttle.
I forget if the 75 has an on & off light switch by the throttle.

Three wires going to the front signals for running and signal. Two filament 1157 bulb.
Two wires going to the back, signal only. Single filament 1156 bulb.

Ken

[setdog]

You are correct its green.

I'm an idiot and confused.

So...would it be correct to have two amber lights running in front and the two rear only blink and not run?

If yes...then my lights must be correct.

Edit: Your previois post landed before mine.

Thanks all for your help

I need a beer!

[CR125Honda]

You are correct its green.

I'm an idiot and confused.

So...would it be correct to have two amber lights running in front and the two rear only blink and not run?

If yes...then my lights must be correct.

Yep..  Your good to go!

[CR125Honda]

The other one in the system that confused me was the red wire dangling back by the starter solenoid.
As I recall, it didn't show up in the Cylmer's schematic.
Took a few years but one day I was looking at the supplemental and there is was..

Regards. Ken

[TwoTired]

when i look at the supplemental diagram, i find a green wire, with female lead next to the winker relay.  the relay has two prongs, black and gray wire, theres a green wire there but its not attached.  wonder if were thinking of the same thing.

The stock flasher does not need the green wire.  But, there are three prong flashers that do.

[TwoTired]

twotired,

this all started because my batt was too low to start my bike after a short ride.  the turn signals had not worked properly at the time.  i dont ride at night, (yet), so i never rode with lights on.  and my blinkers never really worked properly.  left turn wouldnt work, right turn wouldnt work.  then left turn would work front only. or right only, then 3 lights, or no lights.

now i got left turn (fr n rear) working and right turn (fr n rear) working but only the front bulbs stay on (run).

That's the way it is supposed to work.

anyway, i tore it up a bit, and found left front with a single fil bulb, right front with a double fil bulb.  so i assumed this is where the power was being drained and I could be WAYYYY off but thats me learning slowly.

now i have at least the correct bulbs in the front and rear.  and this has led me to where i am atm.  trying to figure out if i have the correct wiring.  2 or 3, with my two front signals both running and blinking but the two rear blink, yet dont run.  (when i say run i mean stay on)  and yes they are amber.

That's the way it is supposed to work.

i wondered if they should run, and i think they should, but i do not know for certain.

Rear signals aren't running lights.  They would need red lenses if they were.

the connection you refer to, i believe is the small wire, that i thought was a ground, and is screwed to the small socket.  if this is the gray wire, its not represented in either of the diagrams.  therefore, im wondering if my wiring is correct according to diagram.

The Grey wire, labeled GR in the 224, K5 wire diagram, routes power from the flasher to the bar control which distributes it to the L & R turn sigs.  If they are blinking, this is probably wired up right.  Honda convention Grey = blinker power.

Green (G) is is ground or more correctly a connection to Batt NEG terminal.

I don't think you will cure a charging problem by fixing the flashers.  But, if the wiring is buggared, anything is possible I suppose.

[Vinhead1957]

The biggest problem I have had is the grounds on signals. The mounts on the rear lights get very corroded and loose connection. I added a ground wire direct from  each light that ties into the rear brake light ground .

[Xnavylfr]

Here maybe this will help!!

http://oldmanhonda.com/MC/wiring750K1.html



Xnavylfr(CHUCK)

[setdog]

Since this post, i have not had to recharge my battery with the trickle charger!

just a belated thanks !