what would cause my trailing lights and headboard lights to not work?

have u ck'd the bulbs on dash fuses?

The taillight filament burns out, taillights Poor Ground or taillight line circuit. Inspection, you should first remove the taillight bulb, check the filament burns out. If the filament is intact, then the Shi Dianbi or screwdriver will taillights FireWire terminal iron scraping the fire, If no spark, open circuit at the taillight line; to find the open circuit at the connected wires; If sparks, bad taillight Ground.