Wiring Diagram AUDI A4 2001 - Heated steering wheel
| D | Ignition/starter switch |
| E1 | Lighting switch |
| E94 | Heated driver's seat adjuster |
| F138 | Airbag coil connector |
| G189 | Overheating sensor |
| H | Horn plate |
| H2 | High tone horn |
| H7 | Low tone horn |
| J4 | Dual tone horn relay |
| J383 | Audio steering wheel printed circuit board |
| S227 | Fuse in fuse box |
| S240 | Fuse in fuse box |
| T2ao | 2-pin connector, black, behind steering column switch trim |
| T5g | 5-pin connector, behind steering column switch trim |
| T5h | 5-pin connector, behind steering column switch trim |
| Z36 | Heated steering wheel |
| 135 | Earth connection -2-, in dash panel wiring harness |
| A34 | Connection (75x), in dash panel wiring harness |
| A36 | Connection (75a), in dash panel wiring harness |
| A72 | Connection (71), in dash panel wiring harness |
| A90 | Connection (dual tone horn), in dash panel wiring harness |
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