automatic transmission or manual stick, the brake/clutch switch operations are NOT THE SAME on both car options.
no country told, lighting (for sure external) are not the same all over earth, sorry I do not make laws (like DOT USA?) or anywhere.
this forum is www, a world wide web forum. so where are you ,a country.?
and you work with no voltmeter or service manual schematic.
and no scan tool? wow endless guessing done. throwing parts wild.
its is modern car, 2009 totally unlike a 1990 or 1980 or older car.
for sure.
there is never a need to replace all fuses ever, testing is super easy even if they all look good. (did they?). (look test, ohms or volts tests)
that melting thing means a lamp shorted. (they can)
I see reverse lamps failing and parking lamps
the transmission PRNDL SWITCH MUST WORK IN "R" OR THE LAMPS WILL BE DEAD REVERSE. BOTH WERE SO.....
I GUESS INDICATOR MEANS
turns signals failed( blinkers)
the car has 4 corners, why not tell what all 4 do when Turns or parks fail.?>??? what they all do outside matters most. (electrics)
the huge problem here is not scanning the OBD2 port with a real scan tool. I bet it tells you why it fails I sure do but you failed to do that.
does this car have the parking AID option?
does this car have optioin
Daytime Running Lamps, a.k.a DRL?>?
also wiring for TT is unique so states the SM (service manual)
i can't see you work on any car so now comes right parts questioln
using only these parts.,
Rear Turn Signal Bulb
- Left/right Rear Turn Signal Bulb M6
- Right Rear Turn Signal Bulb M8
- 12 V, 18 W
- W16W
the German manual calls park lamps TAIL even when front and side park lamps are park lamps. same source.
It does call TURNS turns, so we can find the correct schematics,
searching the online service manual for you.
most modern cars, use BCM to run all that. I call it the body brain
each maker uses there names and Germans use CODES
LIke J123. to name a model. (that must be decoded first to work the problem, yes a pain on all germane cars)
deep in the manual i found the secret german body brain
J519 - Vehicle Electrical System Control Module
this module runs the whole rear (it has DRIVERS)
Drives means electronic high power regulator drivers to lamps.
that if it sees a short , it simply goes OFFLINE until cures.
then magically goes back on one,
J519 - Vehicle Electrical System Control Module
M6 - Left Rear Turn Signal Bulb
M8 - Right Rear Turn Signal Bulb
M9 - Left Brake Lamp Bulb
M10 - Right Brake Lamp Bulb
M16 - Left Back-Up Lamp Bulb
M17 - Right Back-Up Lamp Bulb
M37 - Left Rear Side Marker Lamp Bulb
M38 - Right Rear Side Marker Lamp Bulb
T2g - 2-Pin Connector, In the Luggage Compartment, Right, Black
T6k - 6-Pin Connector
T6l - 6-Pin Connector, Black
T12c - 12-Pin Connector, Black
T12d - 12-Pin Connector, Brown
X3 - Rear Fog Lamp
395 - Ground Connection 30 (in Main Wiring Harness)
662 - Ground Connection in Left Rear Side Panel
676 - Ground Connection 2 in Luggage Compartment, Left
------------------------
J519 is here
Behind driver's left stowage compartment, beside steering column -2
Fuse 7 (On Fuse Panel C)? blown fuse?
this car uses CAN BUS.
many of the switches wire directly to the J519 Body brain
but not all.
lets look at that now, (my book is USA only SM)
the steering switchs for park, turn and heads.
are all sent to the cluster brain directly,
then the cluster brain via the CAN_BUS network sends data commands to the J519 (body brain)
then if this fails the scan tool told you it did but you never scanned the OBD2 port. while failing
others found water leaks to dash module (windshield cracks or glued in wrong and leaks)
some Audi versions 2009 have top of brake pedal brake switch that must work, and is direct drive signal to J519
TURNS are not switch actual direct drive to the J519. no.
example 1
U1113 Audi Code
lacking scan tools you will never fix this by guessing. sorry
CAN Bus wiring intermittently open, shorted to power or ground
U0001
U0155<< lost comms to IP cluster.
and more lots and lots more possible
we check all fuses in all fuses boxs A ,B,C etc.
then scan the OBD2 port. for errors. for sure comm errors'
see this fuse box?
Main Fuse Box in Right Rear of Luggage Compartment on Battery
see? drivers (electronic) to each lamp. proof (no fuses to lamps)
so if one lamp shorts. the other do not die. by design
and J519 must get the commands to turn them on first.