1999-2006 Audi TT Fuse Box Diagram

For owners of the 8N model Audi TT spanning from 1999 to 2006, Audi TT fuse box diagrams become a crucial resource. In this timeframe, the car is equipped with two distinct fuse boxes, each positioned at different points on the vehicle. These fuse boxes house specific sets of fuses, each responsible for safeguarding different electrical elements.

Should you encounter issues with any electrical component in your Audi TT, referencing the fuse box diagram can prove beneficial in determining whether the fuse for that particular component has undergone a blowout.

This article is furnished with comprehensive fuse box diagrams about both of these fuse boxes. Additionally, it furnishes descriptions of the individual fuses housed within each box, aiding in a thorough understanding of their respective functions.

Instrument Panel

Fuse Number	Fuse Amp. Rating	Function/component
1	10A	Heated exterior mirror, driver’s side Heated exterior mirror, front passenger’s side Heater element, left washer jet Heater element, right washer jet
2	10A	Hazard warning light switch
3	5A	Glove box light Fog light relay Ar conditioning system/Climatronic operating and display unit
4	5A	Number plate light, left Number plate light, right
5	7.5 A	Fresh air/air recirculating flap switch Continued coolant circulation relay Bulb monitoring device, front Brake pedal switch
6	5A	Central locking control unit
7	10A	Diagnosis connection Reversing light switch Hazard warning light switch Speedometer sender
8	5A	Mobile telephone operating electronics control unit
9	5A	ABS control unit
10	10A/15A	1998-2001: Motronic control unit Motronic current supply relay; 2002-2006: S contact Central locking control unit Control unit in dash panel insert
11	5A	Control unit in dash panel insert Oil level and oil temperature sender
12	7.5A	Diagnosis connection Mobile telephone operating electronics control unit Aerial amplifier for mobile telephone
13	10A	Brake light switch
14	10A	Central locking control unit Door warning lamp, left Door warning lamp, right Interior monitor deactivation switch Interior locking switch, driver’s side Rear lid remote release switch
15	5A	Control unit in dash panel insert Automatic gearbox control unit
16	10A	Radiator fan control unit
17	–	Not used
18	10A	Main beam bulb, right Fog light relay Control unit in dash panel insert
19	10A	Main beam bulb, left
20	15A	Headlight range control motor, right Headlight range control regulator Headlight range control motor, left Bulb monitoring device, front
21	15A	Bulb monitoring device, front
22	5A	Bulb monitoring device, front Side light bulb, right Control unit in dash panel insert
23	5A	Bulb monitoring device, front Side light bulb, left Control unit in dash panel insert
24	20A	Automatic intermittent wash and wipe relay Intermittent wiper switch
25	25A	Ar conditioning system/Climatronic operating and display unit Heated rear window relay Fresh air blower Fresh air blower control unit
26	25A	Heated rear window switch
27	30A	Cabrio windbreak control unit Cabrio windbreak switch
28	20A	Fuel system pressurisation pump
29	15A	Motronic control unit
30	–	Not used
31	5A/20A	Four-wheel drive control unit Automatic gearbox control unit
32	10A	Injectors
33	20A/30A	Automatic intermittent wash and wipe relay
34	10A	Charge pressure control solenoid valve Inlet camshaft control valve 1 Turbocharger air recirculation valve
35	–	Not used
36	15A	Front and rear fog light switch
37	10A/20A	1998-2001 (10A): S contact Central locking control unit Control unit in dash panel insert; 2002-2006 (20A): Motronic control unit Motronic current supply relay
38	15A	Central locking control unit Anti-theft alarm system horn
39	15A	Hazard warning light switch
40	20A	Dual tone horn relay
41	15A	Cigarette lighter
42	20A	Radio Amplifier
43	10A/15A	Activated charcoal filter system solenoid valve 1 Secondary air inlet valve Secondary air pump relay Air mass meter Exhaust gas temperature sender 1
44	15A	Heated driver’s seat regulator Heated front passenger’s seat regulator

Relays

Number	Equipment
1	Not used
2	Bulb monitoring device, front
3	Bulb monitoring device, front
4	Fog light relay
5	Starter inhibitor relay
6	Not used
7	Brake light suppression relay / Not used (from model year 2003)
8	Not used
9	Not used
10	Heated rear window relay
11	Starter inhibitor relay
12	Cabrio windbreak control unit
13	Continued coolant circulation relay / Reversing light relay
14	Not used
15	Not used
16	Not used
17	Not used
18	Differential lock fuse (Haldex coupling) (up to model year 1999) / Not used (from model year 2000)

Number	Equipment
1	Dual tone horn relay
2	X contact relief relay
3	Not used
4	Fuel pump relay
5	Automatic intermittent wash and wipe relay
6	Automatic intermittent wash and wipe relay
A	Convertible roof actuation fuse
B	Hydraulic pump relay fuse
C	Electric window thermo-fuse

Engine Compartment

Fuse Box 1

Fuse Number	Equipment
1	Secondary air pump relay
2	Motronic current supply relay
3	Hydraulic pump relay fuse
4	Secondary air pump fuse
5	Not used
6	Not used
7	Automatic gearbox control unit fuse
8	Not used
9	Not used

Fuse Box 2

Fuse Number	Equipment
S131	Secondary air injection pump
S132	Engine management
S133	Cooling fan 2
S134	Interior
S138	Alternator
S162	ABS pump
S163	ABS valves
S164	Cooling fan

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