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What could be causing the head lights on a 2002 harley Davidson to not work?

Fuse issues: Check the fuse box and ensure that the fuses for the headlights are intact and not blown.

Light bulb issues: Check the light bulbs to ensure that they are not burnt out. If they are, replace them with bulbs of the correct wattage and type.

Faulty wiring: Check the wiring for any loose connections or damage. Check for frayed or broken wires, particularly in areas near the handlebars and front end of the motorcycle.

Switch issues: Check the headlight switch to ensure it is functioning properly. Try turning it on and off several times to see if the headlights will come on.

Relay issues: If the headlights are not working, the headlight relay may be faulty. Check the relay and replace it if necessary.