I don't know these newer cars as much but does the left top fender indicator come on when the hi-beams are turned on?
If not then my next question is, which fender or are they both on?
And kind of what a383 says, you may have a bad bulb or a bulb not seated correctly on the appropriate side for the fender. This happend to me on a taillight once, the 1157 was not in and locked causing the turn indicator to be on when I hit the brakes (77 Truck)....
Post the fix this is interesting....