My headlights worked except the bright. Then I replaced to alternator 3 times now and the regulator. And now my lights don't world. But I ppull my switch sidemarkers and running lights are on but still no headlights.
The dimmer switch may be your most likely culprit based on what you said. With the lights on, check each wire at the dimmer switch with a test light and see if you have power on any of them. I think the red/yellow is from the switch. If you have power into the dimmer switch but not out, the dimmer switch is defective. Red/black should be to the headlight low beams and the green/black should be high beams.
