One of the small bulbs above the headlight, correct? You can easily remove the screw holding the clear cover in place and inspect the bulb. It may be loose in it's socket, or the bulb filament may be bad and the bulb needs replacing. If it's in there tight, and the filament looks good, then you may need to check the wiring connections behind the headlight. Again, the headlight is also easily removed with a screwdriver. Just follow the wiring from the bulb socket to it's plug, and look for anything loose. My bet would be on just a bad bulb.