Wipers , heater , indicators does not work - 2005 Audi TT

I would suspect a blown fuse that may be under the hood or a fusible link.

Is the coolant level full ? Are the heater hoses hot to the touch ? Do you know where the heater hoses are ? Out in the engine compartment going through the fire wall into the passenger compartment . 2 hoses , one carries hot coolant into the heater core the other is a return back to the cooling system . If hoses are hot you have a temp. door not working . When warmed up what does temp gauge show ?
Temperature Control
The temperature control operates in the following manner:

• Temperature control of the manual A/C-heater system is determined by the position of the temperature control knob (between COOL and WARM).
• This control knob is connected to a potentiometer mounted in the integrated control panel. This potentiometer is electrically connected to the A/C electronic blend door actuator that operates the A/C air temperature control door.
• The A/C electronic blend door actuator contains a reversible electric motor, another potentiometer and a printed circuit board. The wiper of the potentiometer is connected to the actuator output shaft and moves with the output shaft to indicate the position of the A/C air temperature control door.
• Battery voltage is applied to the ends of each potentiometer. The voltage available at each wiper indicates the position of the potentiometer. The printed circuit board drives the actuator in whichever direction is necessary to make the actuator wiper voltage agree with the control wiper voltage.

System uses a reheat method to provide conditioned air to passenger compartment.

• All airflow from the blower motor (18527) passes through the A/C evaporator housing where it can be cooled and dehumidified.
• Temperature is then regulated by reheating a portion of the cooled dry air and blending it with the remaining cool air to the desired temperature.
• Temperature blending is varied by the A/C air temperature control door which regulates the amount of cooled air that flows through and around the heater core (18476), where it is mixed and distributed.

check combination switch

Check the fuses and panel for corrosion.Its highly likely that you have a water leak inside the car,causing the fuses to corrode. Id check all the fuses,and put electric grease on them all,...and then figure out where the water leak is coming from and fix it.

Do you know what a automotive electrrical wiring diagram is ? How to use a DMM- digital multi-meter ? Pick one system an diagnose an you will probably fix all the syatems . Voltage drop testing . Voltage or ground side problem .
Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia
Free wiring diagrams http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine size. View wiring diagrams an test the circuits.

Check grounds around in engine compartment (usually bundles of brown wires) and fusible links

hazard relay should be the same as the turn indicators. They are separated with diodes that are in line with the wireing!

problem has been solved incorrect relay supplied

Disconnect blower motor & try another fuse....if it don't blow fuse then blower motor shorting out..

see if you got any broken wires from your dash to the fire wall,it could be a short between the wires, but get a second opinion,thats all i can think of....

Hope it helps...