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You Have a bad headlight, it's common when a headlight burns out for only the high beam to work, solution change your headlight.
High beam light is out!
There are two elements in every headlight. One is for low beam (normal usage) and one is for the high beam. The high beam element tends to burn out sooner than the low beam, and it is very possible that one of your high beam elements has simply burned out. The solution is simple. Replace the offending headlight and you'll have both high beams back.
change the light bulb that does not go on, on low beam, it possible that the wire inside the bulb for low beam is broken
It sounds like the low beam/high beam switch is bad. Fuses are not the problem since they are built into the headlight switch and would cause headlights to blink or not come on for both high and low beam headlights.
The headlight has two filaments. One for the high beam and one for the low beam. The most likely reason the high beam is out is because the high beam filament is broken. Replace the bulb and it should fix it.
9006 for the low beam 9005 for the high beam
Probably the low beam filament in the dual beam headlight lamp is burnt out. See sources and related links below for more information on the headlight lamp.
If you haven't already, replace the headlight. Chris
Time for a new headlight switch it may be the wiring at the headlight. mine did the same thing, i jiggled the connector behind the light and it worked fine.
9006x for the low beam and 9005x for the high beam.
The blue light is the high-beam indicator. The only reason I can think of that it would be flashing is the headlight relay isn't latching into the high-beam position.