Wiring Diagram AUDI A3 2002 - Fuses - front and rear fog light switch - fog light bulbs - twin filament bulbs for headlights

| D | Ignition/starter switch |
| E4 | Headlight dipper/flasher switch |
| E7 | Fog light switch |
| E18 | Rear fog light switch |
| J218 | Combi-processor in dash panel insert |
| L1 | Twin filament bulb/sealed beam insert, left |
| L2 | Twin filament bulb/sealed beam insert, right |
| L22 | Fog light bulb, left |
| L23 | Fog light bulb, right |
| L46 | Rear fog light bulb, left |
| S18 | Fuse in fuse box/relay plate |
| S19 | Fuse in fuse box/relay plate |
| S236 | Fuse in fuse box |
| T4j | 4-pin connector, headlight, left |
| T4l | 4-pin connector, headlight, right |
| T32 | 32-pin connector, blue, on dash panel insert |
| 277 | Earth connection -3-, in interior wiring harness |
| 280 | Earth connection, in communication systems wiring harness |
| 285 | Earth connection -7-, in interior wiring harness |
| A88 | Connection (NSL (rear fog light)), in dash panel wiring harness |
| B138 | Positive (+) connection (X), in interior wiring harness |
| B142 | Positive (+) connection -2- (56a), in interior wiring harness |
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