I have a pack of simple LED lights that I planned on wiring in my boat for cabin lights.
I installed and wired them all in a simple series circuit. Power supply connected to switch, switch connected to positive side of first LED and negative to positive of the remaining LEDs and so on, then connected to ground.
None of the lights will work.
When I test each individual light with a 12V source they work fine but when I wire 2 or more in series they will not pass voltage through the LED to light the next light.
What am I doing wrong?