Very glad for this thread, as I'm putting the bike back together after track day (I removed signals) and was wondering why the rear's weren't working once reconnected. (They signal properly). Now I know they aren't supposed to come on.
On the down side, there does seem to be an issue on one side. Both are lit but blinking fast.
Brake light works, but tail light does not. License plate light is lit.
Edit:
Update...
Okay... it's the bulb.
Since I can't get a replacement until tomorrow, wondering if the left side signals fast-blink is telling me the tail light is out? Both signals are working (front and rear both sides). Right side blinks normal.