head lamp not working and bulb is fine

Hi @raybowers,left he

Did you check if voltage is being applied to the appropriate bulb connection when the headlamp is turned on?

If so, check that there's a good earth connection to the bulb.

If you don't have a DMM (digital multimeter) to check for voltage or an earth, run a temporary cable between an earth point (-ve pole of battery) and the earth connection on the bulb and check. At least this will eliminate the possibility of a faulty earth connection