I asked this question today and misunderstood the first poster's answer because he was talking about a 1998 A6. The answer is that the turn signal relay for a 2002 A6 is part of the Hazzard switch. First of all, make sure it's really the turn signal relay. If ANY of the bulbs are loose or about to fail, the turn signal will rapid flash to alert you. You might still see light, but if the system thinks one of the bulbs is dead, it will flash quickly on that side and it might make you think it's the turn relay. Before you determine your turn signal relay is dead, Check all of the bulbs. Once you have determined it is the turn signal relay, pry off the trip molding around the hazzard switch, pop out the rectangular switch behind the triangle, and replace this piece. It will cost about 26.00, and if it's not the relay your dealer will not replace it. It is also possible the front turn signal lights are LOOSE - if the a separate plastic socket houses the bulb, but the electrical connections are inside this piece. If the socket isn't tight, you'll have a poor connection and it will seem like the bulb is dim and ready to die - and -- rapid flash on this side. I spent an hour chasing a flasher relay issue when all that was wrong is a bulb was near dead or loose. Changing these bulbs are a bear unless you have very small hands. Since you're going through this process I'd replace the turn signal bulbs ($5.00) in the front. the rear bulbs are a snap to replace. If I could have given a pro $10.00 to change both turn signal lights I wouldn't be trying to get the grease off my hands for having to submerge my arms under the hood to get to the almost impossible to reach turn signal bulbs int the front.
bad bulb, relay, wiring, turn signal switch
Replace turn signal flasher
The turn signal flasher relay is located behind the hazard light switch, which you can access by removing the associated dash trim panel
behind the hazard button, its built as complete assembly for Turn/hazard signal
the hazard and turn signal are both in the same relay
If your hazards still work, most likely your turn signal relay needs to be replaced.
If the turn signal relay & hazard (emergency) relay are side by side, turn on the emergency blinkers. You will hear & feel (if you touch the relay) the emergency relay clicking. Turn signal relay is the other one.
http://www.audiforums.com/m_146946/tm.htm
The hazard relay is the turn signal relay as well. The grinding noise is actually the relay buzzing trying to engage. Mine made the noise occasionally and now the turn signals do not Work at all. TIME TO REPLACE THE RELAY.
you have to replace the turn signal/hazard relay in the center dash it just pops out with a flat head screw driver. just take off the cover carefully then use the screw driver to lever the hazard out.
The turn signal relay and the flasher relay are the exact same thing. The relay switch controls the turn signals.
A turn signal flasher for that vehicle resembles a relay.