Wiring Diagram VW TRANSPORTER 2003 - Battery - alternator - starter - continued coolant circulation
| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| F18 | Radiator fan thermo-switch |
| F95 | Thermo-switch for continued coolant circulation |
| SA1 | Fuse -1- on battery fuse box |
| SA5 | Fuse -5- on battery fuse box |
| T1 | Single connector, behind relay plate |
| T1g | Single connector, behind relay plate |
| T1p | Single connector, behind relay plate |
| T1q | Single connector, behind relay plate |
| T2m | 2-pin connector, near starter |
| V51 | Continued coolant circulation pump |
| 1 | Earth strap, battery - body |
| 2 | Earth strap, gearbox - body |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| C10 | Positive (+) connection -1- (30), in headlight wiring harness |
Wiring Diagram VW TRANSPORTER 2003 - Diesel control unit - glow plug relay - door contact switch - driver's side - fuel shut- off valve - fuel shut- off valve control unit - self-diagnosis connection
| F2 | Door contact switch, driver's side |
| J52 | Glow plug relay |
| J362 | Immobilizer control unit, behind dash panel insert, right |
| J366 | Fuel shut-off valve control unit, |
| J425 | Diesel control unit, above the relay plate |
| N109 | Fuel shut-off valve |
| T1c | Single connector, behind relay plate |
| T2 | 2-pin connector, near fuel shut-off valve |
| T8c | 8-pin connector |
| T18 | 18-pin connector |
| TV2 | Terminal 30 junction box, red, both have 6-pin |
| TV14 | Terminal for self-diagnosis, white |
| TV17 | Terminal for door contact switch (with load), brown |
| TV25 | Terminal for door contact switch (no load), pink |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
Wiring Diagram VW TRANSPORTER 2003 - Diesel control unit - exhaust gas recirculation - speedometer sender - glow plugs - engine - heater element (crankcase breather)
| F166 | Part throttle switch for exhaust gas recirculation |
| F188 | Throttle cable switch for exhaust gas recirculation |
| G22 | Speedometer sender (Hall sender, on gearbox) |
| J425 | Diesel control unit, above the relay plate |
| N79 | Heater element (crankcase breather) |
| N161 | Exhaust gas recirculation two-way valve |
| Q6 | Glow plugs (engine) |
| T18 | 18-pin connector |
| 16 | Earth point -1-, on cylinder head cover |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| D52 | Positive (+) connection (15a), in engine compartment wiring harness |
| * | Only cold climates |
Wiring Diagram VW TRANSPORTER 2003 - Dash panel insert - oil pressure and coolant warning - coolant temperature sender - fuel gauge sender
| F1 | Oil pressure switch |
| G | Fuel gauge sender |
| G2 | Coolant temperature sender |
| G32 | Coolant shortage indicator sender |
| G62 | Coolant temperature sender |
| J285 | Control unit with display in dash panel insert |
| K3 | Oil pressure warning lamp |
| K28 | Coolant temperature/coolant shortage warning lamp |
| 85 | Earth connection -1-, in engine compartment wiring harness |
Wiring Diagram VW TRANSPORTER 2003 - Dash panel insert - fuel gauge - coolant temperature gauge - odometer display - speedometer - rev. counter - alternator warning lamp - glow period warning lamp
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| G5 | Rev. counter |
| G21 | Speedometer |
| H3 | Buzzer/gong |
| J285 | Control unit with display in dash panel insert |
| K2 | Alternator warning lamp |
| K29 | Glow period warning lamp |
| T32 | 32-pin connector |
| TV13 | Terminal for speed signal, blue |
| Y4 | Odometer display |
| * | Up to August 2000 |
| --- | From September 2000 |
Wiring Diagram VW TRANSPORTER 2003 - Onboard power supply control unit - radio fuse and combi-processor
| E3 | Hazard warning light switch |
| J14 | Warm air blower relay, control number (53), behind dash panel, centre |
| R | Radio |
| SB9 | Fuse -9- on fuse box/relay plate, below the relay plate |
| SB14 | Fuse -14- on fuse box/relay plate, below the relay plate |
| SB15 | Fuse -15- on fuse box/relay plate, below the relay plate |
| S21 | Fuse -21- on fuse box |
| T1e | Single connector, behind relay plate |
| T4h | 4-pin connector, behind relay plate |
| T8 | 8-pin connector, on radio |
| T8b | 8-pin connector, on hazard warning light switch |
| T16 | 16-pin connector, behind steering column trim, self-diagnosis connection, |
| W | Interior light, front |
| R6 | Positive (+) connection -1-, in interior light wiring harness |
| A40 | Positive (+) connection -1- (30), in instruments wiring harness |
| * | Up to August 2000 |
| --- | From September 2000 |
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