Wiring Diagram AUDI TT 1999 - Radio Bose system Concert with and without CD changer
| D | Ignition/starter switch |
| J218 | Combi-processor in dash panel insert |
| J429 | Central locking control unit |
| K | Diagnosis connection |
| R | Radio |
| S237 | Fuse in fuse box |
| S242 | Fuse in fuse box |
| T1 | single connector, brown, on radio |
| T8 | 8-pin connector, black, radio connector III |
| T16 | 16-pin connector, black, shelf on driver's side (diagnosis connection) |
| T32 | 32-pin connector, blue, on dash panel insert |
| 45 | Earth point, behind dash panel - centre |
| A19 | Connection (58s), in dash panel wiring harness |
| A21 | Connection (86s), in dash panel wiring harness |
| A46 | Positive (+) connection (30 - from radio), in dash panel wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| B145 | Positive (+) connection (58s), in interior wiring harness |
| * | Only models with anti-theft alarm system |
Wiring Diagram AUDI TT 1999 - Radio Bose system Concert with and without CD changer
| J189 | Auto-check system |
| R | Radio |
| R41 | CD changer |
| T6k | 6-pin connector, green, radio connector I-2 |
| T8c | 8-pin connector, blue, radio connector I-3 |
| T10k | 10-pin connector, red, radio connector IV |
| T32b | 32-pin connector, grey, on dash panel insert |
| V14 | Connection (screening), in CD changer wiring harness |
| * | Only models with CD changer |
| ** | Only models with auto-check system |
Wiring Diagram AUDI TT 1999 - Radio Bose system Concert with and without CD changer
| J218 | Combi-processor in dash panel insert |
| J412 | Mobile phone operating electronics control unit |
| R | Radio |
| R1 | Aerial connection |
| R11 | Aerial |
| R12 | Amplifier |
| R51 | Radio/telephone/auxiliary heater aerial |
| R86 | Aerial amplifier, mobile telephone (compensator) |
| R87 | Aerial filter |
| T10k | 10-pin connector, red, radio connector IV |
| T32 | 32-pin connector, blue, on dash panel insert |
| 98 | Earth connection, in tailgate/boot lid wiring harness |
| 255 | Earth connection -1-, in radio wiring harness |
| A116 | Connection -2- (58d), in dash panel wiring harness |
| V34 | Connection (muting), in telephone wiring harness |
| * | Only models without mobile phone/telephone |
| ** | Only models with mobile telephone |
Wiring Diagram AUDI TT 1999 - Radio Bose system Concert with and without CD changer
| R | Radio |
| R12 | Amplifier |
| T6h | 6-pin connector, yellow, radio connector I-1 |
| 45 | Earth point, behind dash panel - centre |
| 255 | Earth connection -1-, in radio wiring harness |
| 256 | Earth connection -2-, in radio wiring harness |
Wiring Diagram AUDI TT 1999 - Radio Bose system Concert with and without CD changer
| R12 | Amplifier |
| R15 | Bass loudspeaker, rear centre |
| R20 | Treble loudspeaker, front left |
| R21 | Bass loudspeaker, front left |
| R22 | Treble loudspeaker, front right |
| R23 | Bass loudspeaker, front right |
| R70 | Internal loudspeaker, centre |
| T10q | 10-pin connector, green, connector carrier, A pillar, left |
| T10r | 10-pin connector, green, connector carrier, A pillar, right |
| V18 | Connection (negative, rear left speaker) in speaker wiring harness |
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