Wiring diagram of AUDI "100" cars with "WC" engine 1983
| Designation | Name | Position |
| A | Battery | 4 |
| IN | Starter | 5-7 |
| WITH | Generator | 8-9 |
| C1 | Voltage regulator | 8-9 |
| D | Ignition switch | 74-78 |
| E1 | Outdoor Light Switch | 71-74 |
| E2 | Turn signal switch | 54 |
| EZ | Hazard warning switch | 55-59 |
| E4 | Headlight switch | 79-80 |
| E9 | Air intake and heater fan switch (upper handle on the heater control panel) | 144 |
| E13 | Air distribution switch (lower handle on the heater control panel) | 144 |
| E15 | Rear Window Defogger Switch | 138, 139 |
| E19 | Side light switch | 75 |
| E20 | Instrument lighting switch | 123 |
| E22 | Windscreen wiper switch | 96-99 |
| E23 | Fog light and rear fog light switch | 89, 91 |
| F | Brake light switch | 63 |
| F1 | Oil pressure sensor calibrated at 1.8 kg/cm² | 126 |
| F2 | Ceiling light switch in the left front door pillar | 155 |
| F3 | Ceiling light switch in the right front door pillar | 157 |
| F4 | Reverse light switch | 45 |
| F5 | Trunk light switch | 88 |
| F9 | Parking brake indicator light switch | 104 |
| F10 | Ceiling light switch in the left rear door pillar | 156 |
| F11 | Ceiling light switch in the right rear door pillar | 158 |
| F14 | Coolant Temperature Warning Light Sensor | 106 |
| F18 | Engine cooling system fan motor switch sensor | 43 |
| F21 | Sensor for insufficient fluid pressure in the brake booster system | 109 |
| F22 | Oil pressure sensor calibrated to 0.3 kg/cm² | 125 |
| F25 | Throttle switch | 32 |
| F26 | Thermal time relay | 20-22 |
| F34 | Brake Fluid Level Indicator Light Sensor | 108 |
| F51 | Overheating fuse on the holder | 140 |
| F52 | Low Coolant Temperature Warning Light Sensor | 107 |
| F62 | Vacuum switch for gear shift indicator | 41 |
| F66 | Low Coolant Level Indicator Sensor | 105 |
| F68 | Gear shift indicator sensor | 29 |
| F74 | Thermoelectric switch for stabilizing engine idle speed | 37 |
| F75 | Brake booster fluid level alarm sensor | 110 |
| G | Fuel level indicator sensor | 26 |
| G1 | Fuel level indicator | 132 |
| G5 | Tachometer | 128 |
| G6 | Fuel electric pump | 25 |
| G40 | Hall sensor of the ignition distributor sensor | 11-13 |
| G43 | Electronic control circuit for warning lights for coolant temperature and brake fluid level, low pressure and low fluid level in the brake booster system | 109, 110 |
| N | Horn switch | 102 |
| H1 | Sound signal | 103 |
| J2 | Direction indicator and hazard warning flasher relay | 52-54 |
| J4 | Horn relay (7) | 102, 103 |
| J5 | Fog light relay (1) | 89, 90 |
| J6 | Voltage stabilizer | 131 |
| J17 | Fuel pump activation relay (10) | 22-24 |
| J26 | Engine cooling system fan motor switch relay (2) | 42-43 |
| J31 | Windscreen wiper relay (9) | 97-99 |
| J39 | Headlight washer relay (4) | 100, 101 |
| J59 | Unloading relay for contact "X" of the external lighting switch (5) | 75-76 |
| J87 | Electronic idle speed control DLS (11) (12) | 33-37 |
| J98 | Gear Shift Indicator Control Unit (3) | 28-41 |
| J114 | Oil pressure warning light control unit (5) | 126-131 |
| J118 | Brake lining wear indicator lamp relay (1) | 133, 134 |
| K1 | High beam indicator lamp | 117 |
| K2 | Low battery indicator light | 115 |
| K3 | Oil pressure warning light | 126 |
| K5 | Direction indicator lamp | 121 |
| Kb | Hazard warning light indicator | 116 |
| K10 | Rear window heating indicator light | 120 |
| K13 | Rear fog light indicator lamp | 129 |
| K14 | Parking brake and brake lining wear indicator light | 113 |
| K28 | Coolant temperature warning light | 111 |
| KZZ | Brake fluid level, low pressure and emergency fluid level warning lamp in the brake booster system | 112 |
| K43 | Low Coolant Temperature Warning Light | 114 |
| K48 | Indicator light of the on-gear indicator | 127 |
| L1 | Low and high beam lamp of the left headlight | 119 |
| L2 | Right headlight low and high beam lamp | 83-85 |
| 18 | Clock Lighting Lamp | 84-86 |
| L10 | Instrument cluster illumination lamp | 124, 125 |
| L15 | Ashtray Lighting Lamp | 146 |
| L20 | Rear fog light bulb | 89 |
| L21 | Heater lever illumination lamp | 145 |
| L22 | Left fog light bulb | 91 |
| L23 | Right fog light bulb | 92 |
| L28 | Cigarette lighter socket illumination lamp | 147 |
| L29 | Underhood lamp | 48 |
| L40 | Fog light and rear fog light switch illumination lamp | 92 |
| M1 | Parking light bulb in the left headlight | 66 |
| M2 | Parking light bulb in the right rear light | 60, 61 |
| M3 | Parking light bulb in the right headlight | 67 |
| M4 | Parking light bulb in left rear light | 64, 65 |
| M5 | Left Front Turn Signal Lamp | 53 |
| Mb | Turn signal lamp in left rear light | 54 |
| M7 | Right Front Turn Signal Lamp | 55 |
| M8 | Direction indicator lamp in the right rear light | 56 |
| M9 | Brake light and side light bulb in left rear light | 63 |
| M10 | Brake light and side light bulb in right rear light | 62 |
| M16 | Reversing light bulb in left rear light | 45 |
| M17 | Reversing light bulb in the right rear light | 47 |
| N | Ignition coil | 16, 17 |
| N7 | Starting nozzle | 21 |
| N9 | Control pressure regulator | 27 |
| N12 | Brake lining wear sensor for right wheels | 136, 137 |
| N13 | Brake lining wear sensor for left wheels | 134, 135 |
| N₂3 | Additional resistor for the heater fan motor | 144 |
| N₂4 | Additional resistor for the heater fan motor | 141 |
| N41 | Ignition system switch | 10-13 |
| N60 | Solenoid valve of the economizer | 122 |
| N62 | Additional air supply valve | 34 |
| N65 | Idle Speed Control Solenoid Valve | 31 |
| ABOUT | Ignition distributor sensor | 14-18 |
| R | Spark plug tips | 14-18 |
| Q | Spark plugs | 14-18 |
| R | Radio receiver connector | 150, 151 |
| R1 | Antenna connector | 151, 152 |
| S1, S3, S15-S21, S2, S4, S14, S22 | Fuses on the mounting block | |
| T1 | Single plug connector (on the right in the powertrain compartment) | |
| T1a | Single plug connector (behind the instrument cluster) | |
| T1b | Single plug connector (behind the instrument cluster, in the steering column) | |
| T2 | 2-Plug Connector (behind the instrument cluster) | |
| T2a | 2-Plug Connector (behind the instrument cluster) | |
| T2b | 2-Pin Connector (behind the instrument cluster) | |
| T2s | 2-Plug Connector (on the left in the powertrain compartment) | |
| T2d | 2-Plug Connector (on the right in the powertrain compartment) | |
| T2e | 2-Plug Connector (behind the instrument cluster) | |
| T2f | 2-Plug Car Radio Balance Control Connector (behind the instrument cluster) | |
| TZ | 3-pin connector (behind the instrument cluster) | |
| TZa | 3-pin connector (on the right in the powertrain compartment) | |
| T3b | 3-pin connector (on the left in the powertrain compartment) | |
| TZs | 3-pin connector (behind the instrument cluster) | |
| T4 | 4-pin connector (on the left in the powertrain compartment) | |
| T4b | 4-pin connector (behind the instrument cluster) | |
| T4s | 4-pin connector (behind the instrument cluster) | |
| Tba | 6-pin connector (behind the instrument cluster) | |
| Tbb | 6-pin connector(behind the instrument cluster) | |
| T12 | 12-pin instrument cluster connector | |
| U1 | Cigarette lighter | 148 |
| V | Windscreen wiper motor | 94-97 |
| V2 | Heater Fan Motor | 144 |
| V5 | Windscreen washer motor | 100 |
| V7 | Engine cooling system fan electric motor | 101 |
| VII | Headlight washer motor | 42 |
| W | Interior light | 154 |
| W3 | Trunk light lamp | 88 |
| W6 | Glove compartment light | 118 |
| X | License plate light | 50 |
| Y2 | Digital display watch | 49-50 |
| Z1 | Rear window heating element | 138 |
This article was copied from an online resource AudiManual