03-03-2018, 08:50 PM
Just went down the automotive relay rabbit hole myself wiring up my radiator fan. They're easy to troubleshoot. What should be happening is when you throw the headlight switch on, that should be closing the switch in the relay and allowing power to go to your headlights by closing the circuit. This is the best video I found. https://www.youtube.com/watch?v=uUSxo-CCLR8 In your case instead of the ignition switch you're using a headlight switch and instead of the radiator fan it's obviously your headlights.
You seem to be getting power to the relay but turn your lights on and see if you're getting power through the relay as well. If you are. then it's likely a problem at the headlights themselves.
You seem to be getting power to the relay but turn your lights on and see if you're getting power through the relay as well. If you are. then it's likely a problem at the headlights themselves.