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Wiring Diagram VW GOLF 2003 - Battery - Starter - Alternator - Voltage regulator - Fuse 5 (30) - in battery fuse holder
| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| J59 | X-contact relief relay |
| J226 | Starter inhibitor and reversing light relay |
| S162 | Fuse 1 (30), in battery fuse holder |
| S163 | Fuse 2 (30), in battery fuse holder |
| S176 | Fuse 4 (30), in battery fuse holder |
| S177 | Fuse 5 (30), in battery fuse holder |
| T2e | 2-pin connector |
| T6 | 6-pin connector |
| 500 | Threaded connection 1 (30), on relay plate |
| 502 | Threaded connection 1 (30a) on relay plate |
| D97 | Connection (50), in engine compartment right wiring harness |
| * | According to equipment |
| *2 | Only models with automatic gearbox |
| *3 | Only models with manual gearbox |
Wiring Diagram VW GOLF 2003 - Current supply relay for Simos control unit
| D | Ignition/starter switch |
| J363 | Current supply relay for Simos control unit |
| S229 | Fuse 29 in fuse holder |
| S231 | Fuse 31 in fuse holder |
| S237 | Fuse 37 in fuse holder |
| T6 | 6-pin connector |
| T17a | 17-pin connector |
| 501 | Threaded connection 2 (30), on relay plate |
| A2 | Positive connection (15), in dash panel wiring harness |
| A32 | Positive connection (30), in dash panel wiring harness |
| A98 | Positive connection 4 (30), in dash panel wiring harness |
| A104 | Positive connection 2 (15), in dash panel wiring harness |
| D51 | Positive connection 1 (15), in engine compartment wiring harness |
| * | According to equipment |
Wiring Diagram VW GOLF 2003 - Throttle valve drive for electric throttle - Throttle valve drive angle sender 1 for electric throttle - Throttle valve drive angle sender 2 for electric throttle - Throttle valve module - Simos control unit - Ignition transformer - Spark plug connector - Spark plugs
| G186 | Throttle valve drive for electric throttle |
| G187 | Throttle valve drive angle sender 1 for electric throttle |
| G188 | Throttle valve drive angle sender 2 for electric throttle |
| J338 | Throttle valve module |
| J361 | Simos control unit |
| N152 | Ignition transformer |
| P | Spark plug connector |
| Q | Spark plugs |
| T4a | 4-pin connector |
| T6a | 6-pin connector |
| T10w | 10-pin connector |
| T121 | 121-pin connector |
| D51 | Positive connection 1 (15), in engine compartment wiring harness |
Wiring Diagram VW GOLF 2003 - Power assisted steering pressure switch - Coolant temperature display sender - Engine speed sender - Knock sensor 1 - Coolant temperature sender - Simos control unit
| F88 | Power assisted steering pressure switch |
| G2 | Coolant temperature display sender |
| G28 | Engine speed sender |
| G61 | Knock sensor 1 |
| G62 | Coolant temperature sender |
| J361 | Simos control unit |
| T3 | 3-pin connector |
| T3a | 3-pin connector |
| T17a | 17-pin connector |
| T121 | 121-pin connector |
Wiring Diagram VW GOLF 2003 - Map-controlled engine cooling system thermostat - Hall sender - Exhaust gas recirculation potentiometer - Simos control unit - Exhaust gas recirculation valve - Variable intake manifold changeover valve
| F265 | Map-controlled engine cooling system thermostat |
| G40 | Hall sender |
| G212 | Exhaust gas recirculation potentiometer |
| J217 | Automatic gearbox control unit |
| J361 | Simos control unit |
| N18 | Exhaust gas recirculation valve |
| N156 | Variable intake manifold changeover valve |
| T2a | 2-pin connector |
| T3b | 3-pin connector |
| T6d | 6-pin connector |
| T10 | 10-pin connector |
| T68 | 68-pin connector |
| T121 | 121-pin connector |
| D101 | Connection 1 in engine compartment wiring harness |
| * | Connection for air conditioning system |
| *2 | Connection for radiator fan control unit |
| *3 | Only models with automatic gearbox |
Wiring Diagram VW GOLF 2003 - Simos control unit
| J104 | ABS control unit |
| J217 | Automatic gearbox control unit |
| J361 | Simos control unit |
| T10w | 10-pin connector |
| T47a | 47-pin connector |
| T68 | 68-pin connector |
| T121 | 121-pin connector |
| 131 | Earth connection 2, in engine compartment wiring harness |
| 608 | Earth point, central in plenum chamber |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| * | Only models with automatic gearbox |
Wiring Diagram VW GOLF 2003 - Simos control unit - Injector - cylinder 1 - Injector - cylinder 2 - Injector - cylinder 3 - Injector - cylinder 4
| J361 | Simos control unit |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| S232 | Fuse 32 in fuse holder |
| T10 | 10-pin connector |
| T10d | 10-pin connector |
| T17a | 17-pin connector |
| T121 | 121-pin connector |
| A101 | Connection 3 (87) in dash panel wiring harness |
| D95 | Connection (injectors), in engine compartment wiring harness |
| * | Connection for radiator fan control unit |
Wiring Diagram VW GOLF 2003 - Accelerator position sender - Radiator outlet coolant temperature sender - Accelerator position sender 2 - Potentiometer for temperature selection rotary knob - Simos control unit
| G79 | Accelerator position sender |
| G83 | Radiator outlet coolant temperature sender |
| G185 | Accelerator position sender 2 |
| G267 | Potentiometer for temperature selection rotary knob |
| J361 | Simos control unit |
| T5 | 5-pin connector |
| T6b | 6-pin connector |
| T8f | 8-pin connector |
| T10d | 10-pin connector |
| T10h | 10-pin connector |
| T121 | 121-pin connector |
Wiring Diagram VW GOLF 2003 - Lambda probe - Air mass meter - Simos control unit
| G39 | Lambda probe |
| G70 | Air mass meter |
| J361 | Simos control unit |
| T6c | 6-pin connector |
| T121 | 121-pin connector |
| E30 | Connection (87a), in engine wiring harness |
Wiring Diagram VW GOLF 2003 - Simos control unit - Engine speed governor control unit - Vacuum pump for brakes
| J361 | Simos control unit |
| J542 | Engine speed governor control unit |
| S283 | Brake vacuum pump fuse |
| T6k | 6-pin connector |
| T10 | 10-pin connector |
| T10g | 10-pin connector |
| T121 | 121-pin connector |
| V192 | Vacuum pump for brakes |
| B157 | Positive connection 3 (15a), in interior wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| U8 | Positive connection (15a), in automatic gearbox wiring harness |
| * | According to equipment |
| *2 | Only models with automatic gearbox |
| *3 | Cross section depends on equipment |
| *4 | Wiring colour depends on equipment |
Wiring Diagram VW GOLF 2003 - Brake pedal switch - Secondary air pump relay - Simos control unit - Activated charcoal filter solenoid valve 1 - Secondary air pump motor
| F | Brake light switch |
| F47 | Brake pedal switch |
| J299 | Secondary air pump relay |
| J361 | Simos control unit |
| N80 | Activated charcoal filter solenoid valve 1 |
| S13 | Fuse 13 in fuse holder |
| T10e | 10-pin connector |
| T121 | 121-pin connector |
| V101 | Secondary air pump motor |
| 609 | Earth point, on right in plenum chamber |
| A18 | Connection (54), in dash panel wiring harness |
| A20 | Positive connection (15a), in dash panel wiring harness |
| D103 | Connection 3 in engine compartment wiring harness |
| E30 | Connection (87a), in engine wiring harness |
Wiring Diagram VW GOLF 2003 - Cruise control system switch - Cruise control system (CCS) SET button - Clutch pedal switch - Simos control unit
| E45 | Cruise control system switch |
| E227 | Cruise control system (CCS) SET button |
| F36 | Clutch pedal switch |
| J361 | Simos control unit |
| T4q | 4-pin connector |
| T10e | 10-pin connector |
| T10s | 10-pin connector |
| T10w | 10-pin connector |
| T121 | 121-pin connector |
| A20 | Positive connection (15a), in dash panel wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| * | Only models with cruise control system |
| *2 | Only models with manual gearbox |
Wiring Diagram VW GOLF 2003 - Lambda probe after catalytic converter - Fuel pump relay - Simos control unit
| G130 | Lambda probe after catalytic converter |
| J17 | Fuel pump relay |
| J225 | Loudspeaker current supply relay |
| J234 | Airbag control unit |
| J361 | Simos control unit |
| T4b | 4-pin connector |
| T6 | 6-pin connector |
| T10 | 10-pin connector |
| T16b | 16-pin connector |
| T17a | 17-pin connector |
| T75 | 75-pin connector |
| T121 | 121-pin connector |
| A27 | Connection (speed signal), in dash panel wiring harness |
| A125 | Connection (crash signal), in dash panel wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| * | Only models with Climatronic |
Wiring Diagram VW GOLF 2003 - Fuel gauge sender - Fuel system pressurisation pump - Coolant shortage indicator sender - Heater element for crankcase breather
| G | Fuel gauge sender |
| G6 | Fuel system pressurisation pump |
| G32 | Coolant shortage indicator sender |
| N79 | Heater element for crankcase breather |
| S228 | Fuse 28 in fuse holder |
| S234 | Fuse 34 in fuse holder |
| S243 | Fuse 43 in fuse holder |
| T6 | 6-pin connector |
| T17a | 17-pin connector |
| 42 | Earth point, next to steering column |
| 49 | Earth point, near ... |
| 135 | Earth connection 2, in dash panel wiring harness |
| 269 | Earth connection (sender earth) 1, in dash panel wiring harness |
| 504 | Threaded connection 1 (87), on relay plate |
| A27 | Connection (speed signal), in dash panel wiring harness |
| A99 | Connection 1 (87) in dash panel wiring harness |
| A100 | Connection 2 (87) in dash panel wiring harness |
| E30 | Connection (87a), in engine wiring harness |
| * | Only models with crankcase breather heater element |
Wiring Diagram VW GOLF 2003 - Oil pressure switch - Speedometer sender - Oil level and oil temperature sender - Control unit in dash panel insert
| F1 | Oil pressure switch |
| G22 | Speedometer sender |
| G266 | Oil level and oil temperature sender |
| J285 | Control unit in dash panel insert |
| K3 | Oil pressure warning lamp |
| K28 | Coolant temperature and coolant shortage warning lamp |
| K38 | Oil level warning lamp |
| S5 | Fuse 5 in fuse holder |
| S7 | Fuse 7 in fuse holder |
| T17a | 17-pin connector |
| T32 | 32-pin connector |
| T32a | 32-pin connector |
| 85 | Earth connection 1, in engine compartment wiring harness |
| 608 | Earth point, central in plenum chamber |
| A27 | Connection (speed signal), in dash panel wiring harness |
| B163 | Positive connection 1 (15), in interior wiring harness |
| * | Cross section depends on equipment |
Wiring Diagram VW GOLF 2003 - Control unit in dash panel insert
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| G5 | Rev. counter |
| G21 | Speedometer |
| H3 | Buzzer and gong |
| J285 | Control unit in dash panel insert |
| K2 | Alternator warning lamp |
| K105 | Reserve fuel warning lamp |
| T12a | 12-pin connector |
| T32 | 32-pin connector |
| A13 | Connection (door contact switch), in dash panel wiring harness |
| A27 | Connection (speed signal), in dash panel wiring harness |
Wiring Diagram VW GOLF 2003 - Multifunction display call-up button - Multifunction display memory switch - Ambient temperature sensor - Control unit in dash panel insert
| E86 | Multifunction display call-up button |
| E109 | Multifunction display memory switch |
| G17 | Ambient temperature sensor |
| J119 | Multifunction indicator |
| J255 | Climatronic control unit |
| J285 | Control unit in dash panel insert |
| J533 | Data bus diagnostic interface |
| K31 | Cruise control system warning lamp |
| K83 | Exhaust emissions warning lamp |
| K132 | Electronic power control fault lamp |
| T6e | 6-pin connector |
| T12a | 12-pin connector |
| T16 | 16-pin connector |
| T20 | 20-pin connector |
| T32 | 32-pin connector |
| T32a | 32-pin connector |
| U31 | Diagnostic connection |
| A76 | Connection (K-diagnosis wire), in dash panel wiring harness |
| * | Only models with no Climatronic |
| *2 | Only models with Climatronic |
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