Hmm, I know that happens when, of all things, a fuse needs to be replaced sometimes...beleive it or not! Or an instrument isn't working correctly and needs replacement...but more likely the fuse I would think in that instance...
I saw a car that had both it's turnlight signals doing strange things, but both lights were working. The mechanic stated it was due to a fuse.
Also there was a light that indicated whether the car needed oil or a guage like that which came on. The oil was not low, but the light was on. It was also due to a fuse.
So not lots of experience with it, but seeing those above, perhaps it would be a fuse as well?