Wiring Diagram AUDI A3 2002 - Lighting switch - fog lights - headlight dipper/flasher switch and rear fog light

| D | Ignition/starter switch |
| E1 | Lighting switch |
| E4 | Headlight dipper/flasher switch |
| E18 | Rear fog light switch |
| E102 | Headlight range control adjuster |
| J218 | Combi-processor in dash panel insert |
| L9 | Lighting switch light bulb |
| L22 | Fog light bulb, left |
| L23 | Fog light bulb, right |
| L40 | Front and rear fog light switch illumination bulb |
| L46 | Rear fog light bulb, left |
| S236 | Fuse in fuse box |
| T32 | 32-pin connector, blue, on dash panel insert |
| 277 | Earth connection -3-, in interior wiring harness |
| 285 | Earth connection -7-, in interior wiring harness |
| A3 | Positive (+) connection (58), in dash panel wiring harness |
| A88 | Connection (NSL (rear fog light)), in dash panel wiring harness |
| B138 | Positive (+) connection (X), in interior wiring harness |
| B145 | Positive (+) connection (58b), in interior wiring harness |
| B156 | Positive (+) connection (30a), in interior wiring harness |
| * | Only applies to headlights with gas discharge lamps |
| ** | Only applies to ellipsoidal headlights |
Wiring Diagram AUDI A3 2002 - Bulb monitoring device - fuses - side lights - twin filament bulbs
| E4 | Headlight dipper/flasher switch |
| J124 | Bulb monitoring device, rear |
| L1 | Twin filament bulb/sealed beam insert, left |
| L2 | Twin filament bulb/sealed beam insert, right |
| M1 | Side light bulb, left |
| M3 | Side light bulb, right |
| S18 | Fuse in fuse box/relay plate |
| S19 | Fuse in fuse box/relay plate |
| S20 | Fuse in fuse box/relay plate |
| S21 | Fuse in fuse box/relay plate |
| S22 | Fuse in fuse box/relay plate |
| S223 | Fuse in fuse box |
| T4j | 4-pin connector, headlight, left |
| T4l | 4-pin connector, headlight, right |
| 280 | Earth connection, in communication systems wiring harness |
| A51 | Connection (56), in dash panel wiring harness |
| A103 | Connection -2- (56), in dash panel wiring harness |
| B142 | Positive (+) connection -2- (56a), in interior wiring harness |
| B143 | Positive (+) connection (58R), in interior wiring harness |
| B144 | Positive (+) connection (58L), in interior wiring harness |
| * | Only applies to headlights with gas discharge lamps |
| ** | Only applies to ellipsoidal headlights |
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