Instrument Cluster Connectors, Terminal Identification

26-point connector, green, on instrument cluster

Courtesy of AUDI OF AMERICA, LLC

• Always use appropriate wiring diagram

1. Negative (-) for brake fluid level warning switch
2. Not used
3. Negative (-) for coolant overheat warning symbol
4. Not used
5. Negative (-) for 0.3 bar oil pressure switch, checking OIL TEMPERATURE GAUGE 
6. Negative (-) for brake pad sensors
7. Positive (+), terminal 15
8. Not used
9. Not used
10. Negative (-) for alternator warning light
11. Ground (-), terminal 31
12. Input from Engine Control Module (ECM) for tachometer (tachometer signal)
13. Not used
14. Not used
15. Speed signal, output
16. Negative (-) for coolant temperature gauge

17 -  Negative (-) for seatbelt warning light

Courtesy of AUDI OF AMERICA, LLC

18 -  Not used

19 -  Not used

20 -  Not used

21 -  Not used

22 -  Not used

23 -  Not used

24 -  Not used

25 -  Not used

26 -  Not used

26-point connector, red, on instrument cluster

Courtesy of AUDI OF AMERICA, LLC

• Always use appropriate wiring diagram

1. Positive (+) for Headlamp high beam indicator light
2. Negative (-) for seatbelt warning light
3. Negative (-) for fuel gauge
4. Negative (-) for parking brake indicator light
5. Not used
6. Not used
7. Speed signal output
8. Speed signal, input from Speedometer Vehicle Speed Sensor (VSS)
9. Not used

10 - Ground (-), terminal 31

Courtesy of AUDI OF AMERICA, LLC

11 -  Positive (+), terminal 15 (for electronic speedometer and voltage stabilizer)

12 -  Positive (+) for right turn signal

13 -  Negative (-) for ABS warning light

14 -  Positive (+), terminal 30

15 -  Not used

16 -  Not used

17 -  Terminal 58 input (plus from light switch to instrument panel dimmer switch)

18 -  Terminal 58 output

19 -  Not used

20 -  Not used

21 -  Not used

22 -  Terminal 58d output

23 -  Not used

24 -  Not used

25 -  Positive (+) for left turn signal

26 -  Not used

Four-point connector on instrument cluster side panel (for auxiliary instruments)

Courtesy of AUDI OF AMERICA, LLC

1. Signal for oil pressure gauge, checking OIL TEMPERATURE AND OIL PRESSURE GAUGES, CHECKING 
2. Signal for oil temperature gauge, checking OIL TEMPERATURE AND OIL PRESSURE GAUGES, CHECKING 
3. Not used
4. Not used

Six-point connector on instrument cluster side panel

Courtesy of AUDI OF AMERICA, LLC

1. Analog clock adjustment
2. Positive (+), terminal 30
3. Positive (+), terminal 58
4. Positive (+), terminal 58d
5. Ground (-), terminal 31
6. Positive (+), terminal 15

14-point connector, black, on instrument cluster

Courtesy of AUDI OF AMERICA, LLC

1. Input from rear lamp control module -J124-
2. Input from rear lamp control module -J124- (for brake light malfunction)
3. Input from radio for frequency display (from radio connector -T10- /2)
4. Input from radio for frequency display (from radio connector -T10- /1)
5. Not used
6. Not used
7. Not used
8. Input from radio for frequency display (from radio connector -T10- /3)
9. Not used
10. Not used
11. Windshield/Headlamp washer fluid level warning switch, Ground (GND)
12. Oil pressure switch, GND
13. Not used
14. Not used