Topic: Wacky directional signals

[fredmalito4]

 Here’s my next thing to fix on this bike. I think the directional signals are possessed. I have made wiring repairs so that all lights are functioning. All lamps are LED of the correct type, and the flasher has been replaced with an electronic unit suitable for LED. Directional signals did not work on this bike when I got them, due to broken wires, burnt out bulbs and a bad flasher

What I’ve got now is really odd. Flip the directional signal to the left and the rear light comes on, front flash element comes on, front running light goes off. It does not flash. Flip the switch to the right all the way, the buzzer squeals once,  and the lights do the same thing as they do on the left, and they do not flash. If you very gently slide the switch slightly back from it’s locked position, the right light will flash and function normally. This trick  does not work on the left side.

Considering the wiring harness is stock, clean, and lights are functioning, I don’t think this is a wiring issue. I’m going to unplug the buzzer just make sure it’s not  interfering in some way. Short of finding a new switch housing just to test, do you have any other suggestions?

Thanks, Fred.

[FuZZie]

year and model?

[fredmalito4]

Sorry, ‘78 CB750K

[FuZZie]

Can you verify it has the correct gauges with separate right and left flasher lights?

[fredmalito4]

I’m not sure if the guages are correct, but it does have left and right arrows.

[robvangulik]

Unhook both the buzzer and the warning light on your dash, they give trouble combinated with LED's.
Sorry, just realize you said '78, with 2 dash lights that shouldn't be an issue

[Flyin900]

Verify every light has a good ground to the frame and the green ground wires in the connectors are clean both male and female. You may have issues with the LED conversion, yet bad grounds will show up as wonky things like you have described with alternate lights lighting etc.
Just went through the same thing on a CB400F with regular lights doing weird things and it was all in the grounds not being good from repaint/powder coating of parts. The headlight bucket bracket where the front signals are mounted is isolated from the frame with rubber mounts on the bracket.

[FuZZie]

I’m not sure if the guages are correct, but it does have left and right arrows.

That's good you shouldn't need a diode. Try a combo, robvangulik's  unplug buzzer (leave gauge lights connected for now)
and go over the wires like Flyin900 is suggesting.

http://manuals.sohc4.net/cb750k/technical_reference/WD750K8.jpg

EDIT:
also please note if the gauge blinkers are working