I have a pair of LED lights wired on my truck to a 12V 4-pin relay all correctly with a switch. The system worked great every time until I decided I wanted to add a small 5mm LED, so when I turned them on I had an indication in the cab of the truck that my exterior lights were on.
I ran a ground for the LED and then wired the positive leg to the output side of the switch.
When I flip the switch "on", the small LED lights up like it should, but my exterior light no longer come on. That was the only thing I changed but it gets weirder.
If I take the small 5mm LED out of the equation and rewire it exactly how it was working before, it still doesnt work. I tried swapping in a new relay and still nothing. Any idea?