Who knows about electronics and components.

Sorry i don't know the answer,but cant you give maplins a shout pal & explain what you need to do ,they may know what part you need .just a thought

zener diode?

Spoonz wrote: You can block DC with a Capacitor or a diode. BUT I think you would be trying dodge around the issue rather than fix it. I suspect the lights are wired up wrong. The side light should come on with the tail light but i suspect they have wired the brake light into the same circuit. The Yellow wire should feed the tail light and the Yellow/violet should feed the brake light only. If the new light has differing colours go back to the nearest connector and check there.

All wiring itself is fine. Its the led light causing the issue due to the fact I think its a cheap cheap version. Had the whole unit out and appart to test it lol. Found 2 extra wires inside and its one of the ones with integrated indicators. Whoever fitted it couldn't have been to smart as the wiring was shocking. Wires twisted together and insulated with clear household Sellotape lol. Gonna get an original rear light soon but bike was neglected by previous owner and needs lots of small bits sorting first.

Johnboy wrote: Someone did a how to guide on LED indicators using diodes, but it was to stop them back feeding into each side. Like Spoonz says, I think you may have a misplaced wire. Mine are LED rear units, and they are a direct swap. Double check buddy

Definately the light unit. The whole thing looks very cheaply made so prob was built like it. Easy fix but just needed to figure what component I needed. Should have taken pics.

Was hard to notice but yes the normal rear light also lights up when the brake switches are activated. Dash illumination lights come on also. Had a quick google and still unsure what I need as a Zener diode lets power through both ways or some of them do anyway. Just been for a ride and found another fault I now need to sort lol.

Spoonz wrote: A standard diode will only conduct one way. A zener is just a rated diode as in it will conduct only when a trigger voltage is reached. A Zener is often used as a regulator as it will bleed off excess voltage in a circuit. It would still do the job of blocking DC if you polarise it correctly. What i don't see is where you are going to apply it in this circumstance. I still think if it were wired correctly it would work fine. I don't think it is a bleed through, just wrongly wired.

Spoonz you sound like you know electronics better than me as I'm still confused lol. Here's what I've done so far. Unplug rear light and problem dissapears. Wired up some proper bulbs from a Honda rear light unit I have and all is fine. Wired my LED light to a 12v supply with the blue wire to - and the yellow with green wire to + this makes the brake LED's come on allong with the inter grated number plate light. Moved the + to the solid yellow and normal rear light comes on plus Intergrated plate light. Opened up the unit and removed wiring to rule that out and carried out same tests and got same results. Then I put the blue wire to - and the yellow/green to the + which illuminates the brake light and plate light. Whilst still connected I measured between earth (blue) and yellow and I have 12 volts. Also get 12 volts when applying positive to yellow/green and then test between yellow and earth. My logic tells me if I put a one way diode on the yellow wire then it should stop voltage making the front and dash light coming on when using the breaks. And it will still allow the rear light to function properly. Reason I want to sort it is if I'm slowing down then as I feather or use the breaks then my front side light is winking at oncoming traffic.

Will pull it appart again at the weekend. I only done very basic electrics at college. Not good when it comes to component level and pcb fault finding.