head light trouble

i have had trouble with my headlight. when i first start the bike everything is fine then it will go from low beam to high beam by its self. i can hit the hi/lo switch the light will go back to low beam and a few seconds later its on hi again. i started with the easiest thing first and replaced the bulb. next i took the hi/lo switch apart hoping to find some water from rain or a wash down, but it was clean and dry inside. for now i have aimed my light down and just leave the hi beam on. ehc connection, short in a wire? any suggestions?
 
the only thing that has ben changed are the wheels for chrome issues. its still under warranty,but ididnt want to take it in for something that so minor.
 
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