flasher has gone bad and needs replacing.
Turn signal indicators are lights. The flash to tell you, or indicate, that a turn signal is on, and which way the lights are flashing.
No, Flashing your headlight's will have no effect on a traffic signal. The reason a traffic signal changes for emergency vehicles that have the lights flashing, is, they have a special transmitter that tells the light to change. This transmitter is connected to the emergency lights so it comes on when the lights are used.
Have you recently added a trailer hitch? Somewhere the wires have become crossed and that is a common place for it to happen. If anything has been done to any of the lights, that is where I would look first.
Signal lights staying on withot flashing indicates either front or rear signal bulb not working on the Audi
Replace the turn signal flasher relay.
Turn left indicator signal flashes rapidly when I use indicator, bulbs ok, no lights working
The horn, The signal lights, The brake lights, The back up lights, Flashing the high beam headlights,
first thing to replace would be the flasher can
You have a live wire shorting out in the signal circuit. Check the wire harness for damage.
$250
Your owner's manual will list possible problems that such a signal can indicate. In addition be sure you did not accidentally turn the hazard lights on.
your signal light is burned out. The rear signal lights burn out quite quickly and the fast flashing is an indicator you need to replace them.