Need help solving a wiring problem...
I've attached a diagram for the headlight circuit on a car I built. The headlights work, but I've not been successful adding an LED to indicate whether they are in low beam or high beam and need to get that working.
I have an RGB, common cathode LED and have wired it as shown in the picture. It may be obvious to some of you with more electrical experience than me, but but instead of off; green for low beam; blue for high beam -- I'm getting off; green when I turn the headlights on; both green & blue when I flip to high beams; stays both green & blue when I flip back to low beams; goes off if I turn the headlights off.
The one thing I found while trying to trouble shoot that I wasn't expecting is that the wires connected to the 87 pins on relays 2 & 3 show +12V. That makes sense given the lights simply have a coil between the + & - sides but I wasn't expecting that -- not sure if I'm backfeeding 12V to ground [which might explain a couple of gremlins I've been chasing in other parts of my wiring system].
So, net, I have two questions:
1. Is there anything wrong with the headlight circuit the way it is set up in the diagram?
2. Why wouldn't the LED be lighting as expected vs. what I'm getting per above?
Note - I didn't draw in the resistors required for the LEDs to work with 12V power, but I do have them on the LED. Both the blue & green sides do light properly when I connect them directly to the battery to test.
I appreciate any help you can offer!
Thanks in advance.