Hummingbird said:There's only one LED and it's inside the speedo, which I can't access without damaging the speedo.
When the 'Left' switch is on - Current flows through DARK BROWN and earths out through DARK GREEN.
I assume this is what's happening, especially when I see indicators AND the LED lit up. But it doesn't explain why it won't work the same way when the switch is on 'Right'.
Lupusrex said:LED is short for Light Emitting Diode. What a diode does is only letting current flow in one direction. Therefore, it will not light up when it flows the "wrong" way.
If it was me, I'd ground the LED in a conventional way, and then use two conventional diodes, one from each turn signal, and connect them to the + on the LED. That way, the LED will get current from either turn signal lead, but it won't "bleed over" to the other side, and you will have just one LED for both sides.
Hummingbird said:Thanks LR! That really sums it up in English... It never occurred to me LED's only work one way. Makes so much sense now. I thought I had crossed wires!
When the high beams are on, the blue LED glows brighter than the others. So, I'll probably will go ahead with resistors to regulate the brightness. But from what you said, the diodes are a MUST.
The question is what ratings do I need for diodes and resistors??
And running a 2-Pin Relay without a ground wire - Will that work right off the bat or do I need to make changes to the schematic?