2004 Mazda 3 Headlights work no tail and lic. plate lamps.fuses good.wiring ok bulbs good. where does taillamp pwr originate?
Tail lamp power originates from the headlight switch. Based on your statements, I would first look for any codes in the OBD II (CYA = Cover Your A-s) and then replace the headlight switch.
Search Mazda MAZDA3 Questions
Mazda MAZDA3 Experts