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Wiring Diagram VW JETTA 2009 - Onboard supply control unit - Fuse holder A - Fuse holder B
| A | Battery |
| C | Alternator |
| J400 | Wiper motor control unit |
| J519 | Onboard supply control unit |
| SA | Fuse holder A |
| SA1 | Fuse 1 in fuse holder A |
| SB | Fuse holder B |
| SB3 | Fuse 3 on fuse holder B |
| SA5 | Fuse 5 in fuse holder A |
| SB7 | Fuse 7 on fuse holder B |
| SB16 | Fuse 16 on fuse holder B |
| SB19 | Fuse 19 on fuse holder B |
| SB26 | Fuse 26 on fuse holder B |
| T3ba | 3-pin connector |
| T4p | 4-pin connector |
| T4t | 4-pin connector |
| T40 | 40-pin connector |
| T52a | 52-pin connector |
| T52c | 52-pin connector |
| U11 | Interior socket, 230 V, 110 V |
| 507 | Threaded connection (30), on battery fuse holder |
| A17 | Connection (61), in dash panel wiring harness |
| * | According to equipment |
Wiring Diagram VW JETTA 2009 - Onboard supply control unit - Terminal 15 voltage supply relay 2 - Fuse holder C
| J386 | Driver door control unit |
| J387 | Front passenger door control unit |
| J519 | Onboard supply control unit |
| J681 | Terminal 15 voltage supply relay 2 |
| SC | Fuse holder C |
| SC2 | Fuse 2 on fuse holder C |
| SC4 | Fuse 4 on fuse holder C |
| SC12 | Fuse 12 on fuse holder C |
| SC13 | Fuse 13 on fuse holder C |
| SC15 | Fuse 15 on fuse holder C |
| SC17 | Fuse 17 on fuse holder C |
| SC24 | Fuse 24 on fuse holder C |
| T9i | 9-pin connector |
| T20a | 20-pin connector |
| T20b | 20-pin connector |
| T28 | 28-pin connector |
| T28a | 28-pin connector |
| T52b | 52-pin connector |
| A1 | Positive connection (30a), in dash panel wiring harness |
| A2 | Positive connection (15), in dash panel wiring harness |
| B169 | Positive connection 1 (30), in interior wiring harness |
Wiring Diagram VW JETTA 2009 - Onboard supply control unit - Left fog light bulb - Right fog light bulb - Left side light bulb - Front left turn signal bulb - Left headlight dipped beam bulb - Left headlight main beam bulb
| F34 | Brake fluid level warning contact |
| J285 | Control unit in dash panel insert |
| J519 | Onboard supply control unit |
| L22 | Left fog light bulb |
| L23 | Right fog light bulb |
| M1 | Left side light bulb |
| M5 | Front left turn signal bulb |
| M29 | Left headlight dipped beam bulb |
| M30 | Left headlight main beam bulb |
| T2v | 2-pin connector |
| T10i | 10-pin connector |
| T32c | 32-pin connector |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| 47 | Earth point, in front right footwell |
| 367 | Earth connection 2, in main wiring harness |
| 375 | Earth connection 10, in main wiring harness |
| 376 | Earth connection 11, in main wiring harness |
| 381 | Earth connection 16, in main wiring harness |
| 602 | Earth point, in front left footwell |
| 605 | Earth point, on top end of steering column |
| 655 | Earth point, on left headlight |
| * | Only models with fog lights |
Wiring Diagram VW JETTA 2009 - Switch and instrument illumination regulator - Onboard supply control unit - Right side light bulb - Front right turn signal bulb - Right headlight dipped beam bulb - Right headlight main beam bulb
| E20 | Switch and instrument illumination regulator |
| F125 | Multifunction switch |
| G476 | Clutch position sender |
| J519 | Onboard supply control unit |
| J743 | Mechatronic unit for dual clutch gearbox |
| M3 | Right side light bulb |
| M7 | Front right turn signal bulb |
| M31 | Right headlight dipped beam bulb |
| M32 | Right headlight main beam bulb |
| T5m | 5-pin connector |
| T8e | 8-pin connector |
| T10j | 10-pin connector |
| T10n | 10-pin connector |
| T20e | 20-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| 378 | Earth connection 13, in main wiring harness |
| 656 | Earth point, on right headlight |
| * | According to equipment |
| *2 | Only models with dual clutch gearbox 02E |
| *3 | Only models with manual gearbox |
| *4 | Only models with 6-speed automatic gearbox and Tiptronic |
Wiring Diagram VW JETTA 2009 - Light switch - Fog light switch - Onboard supply control unit
| E1 | Light switch |
| E7 | Fog light switch |
| E256 | Button for TCS and electronic stabilisation program |
| J519 | Onboard supply control unit |
| L9 | Light switch illumination bulb |
| T3g | 3-pin connector |
| T6ad | 6-pin connector |
| T6b | 6-pin connector |
| T10h | 10-pin connector |
| T16 | 16-pin connector |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| U1 | Cigarette lighter |
| W1 | Front interior light |
| W31 | Front left entry light |
| W32 | Front right entry light |
| 372 | Earth connection 7, in main wiring harness |
| A167 | Positive connection 3 (30a) in dash panel wiring harness |
| B238 | Positive connection 2 (58b), in interior wiring harness |
| R56 | Connection (entry light), in driver door wiring harness |
Wiring Diagram VW JETTA 2009 - Onboard supply control unit - Heated front seats control unit - Left LED module for daytime running light and side light - Right LED module for daytime running light and side light - Rear left turn signal bulb - Rear right turn signal bulb - Left brake light bulb - Right brake light bulb - High-level brake light bulb
| J519 | Onboard supply control unit |
| J774 | Heated front seats control unit |
| L176 | Left LED module for daytime running light and side light |
| L177 | Right LED module for daytime running light and side light |
| M6 | Rear left turn signal bulb |
| M8 | Rear right turn signal bulb |
| M9 | Left brake light bulb |
| M10 | Right brake light bulb |
| M25 | High-level brake light bulb |
| M33 | Front left side marker bulb |
| M34 | Front right side marker bulb |
| T2ae | 2-pin connector |
| T4a | 4-pin connector |
| T4b | 4-pin connector |
| T5c | 5-pin connector |
| T8v | 8-pin connector |
| T10a | 10-pin connector |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| 50 | Earth point, on left in luggage compartment |
| 86 | Earth connection 1, in rear wiring harness |
| 98 | Earth connection, in rear lid wiring harness |
| 369 | Earth connection 4, in main wiring harness |
| 663 | Earth point, rear right side panel |
| A84 | Connection (58L), in dash panel wiring harness |
| A85 | Connection (58R), in dash panel wiring harness |
| * | Only models with seat heating |
Wiring Diagram VW JETTA 2009 - Bonnet contact switch - Onboard supply control unit - Steering column electronics control unit - Left reversing light bulb - Right reversing light bulb - Number plate light
| F266 | Bonnet contact switch |
| J519 | Onboard supply control unit |
| J527 | Steering column electronics control unit |
| M16 | Left reversing light bulb |
| M17 | Right reversing light bulb |
| T2a | 2-pin connector |
| T4f | 4-pin connector |
| T5a | 5-pin connector |
| T6c | 6-pin connector |
| T20d | 20-pin connector |
| T52a | 52-pin connector |
| T52c | 52-pin connector |
| X | Number plate light |
| 98 | Earth connection, in rear lid wiring harness |
| A201 | Positive connection 6 (15a) in dash panel wiring harness |
| * | According to equipment |
Wiring Diagram VW JETTA 2009 - Brake light switch - Onboard supply control unit - Washer pump - Left washer jet heater element - Right washer jet heater element
| F | Brake light switch |
| J4 | Dual tone horn relay |
| J104 | ABS control unit |
| J400 | Wiper motor control unit |
| J519 | Onboard supply control unit |
| T2t | 2-pin connector |
| T2u | 2-pin connector |
| T4p | 4-pin connector |
| T4y | 4-pin connector |
| T6b | 6-pin connector |
| T47 | 47-pin connector |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| V5 | Washer pump |
| W1 | Front interior light |
| Z20 | Left washer jet heater element |
| Z21 | Right washer jet heater element |
| 382 | Earth connection 17, in main wiring harness |
| A199 | Positive connection 4 (15a) in dash panel wiring harness |
| B131 | Connection (54), in interior wiring harness |
| C53 | Positive connection (x), in heated washer jets wiring harness |
Wiring Diagram VW JETTA 2009 - Hazard warning lights button - Reversing light switch - Onboard supply control unit - Luggage compartment light
| E26 | Glove compartment light switch |
| E229 | Hazard warning lights button |
| F4 | Reversing light switch |
| F256 | Rear lid lock unit |
| G65 | High-pressure sender |
| J519 | Onboard supply control unit |
| K6 | Indicator lamp for hazard warning light |
| T3c | 3-pin connector |
| T3r | 3-pin connector |
| T4 | 4-pin connector |
| T5c | 5-pin connector |
| T6c | 6-pin connector |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| W3 | Luggage compartment light |
| 195 | Earth connection, in rear door switch wiring harness |
| A20 | Positive connection (15a), in dash panel wiring harness |
| B150 | Positive connection 2 (30a), in interior wiring harness |
Wiring Diagram VW JETTA 2009 - Onboard supply control unit - Terminal 75 voltage supply relay 1 - Tank filler flap locking motor
| H12 | Alarm horn |
| J9 | Heated rear window relay |
| J245 | Sliding sunroof adjustment control unit |
| J388 | Rear left door control unit |
| J519 | Onboard supply control unit |
| J680 | Terminal 75 voltage supply relay 1 |
| T2ae | 2-pin connector |
| T2n | 2-pin connector |
| T3r | 3-pin connector |
| T5c | 5-pin connector |
| T6c | 6-pin connector |
| T9m | 9-pin connector |
| T9n | 9-pin connector |
| T18b | 18-pin connector |
| T18c | 18-pin connector |
| T28b | 28-pin connector |
| T28c | 28-pin connector |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| V139 | Rear lid release motor |
| V155 | Tank filler flap locking motor |
| A168 | Positive connection 4 (30a) in dash panel wiring harness |
| A198 | Positive connection 6 (30a) in dash panel wiring harness |
Wiring Diagram VW JETTA 2009 - Onboard supply control unit - Data bus diagnostic interface
| J519 | Onboard supply control unit |
| J527 | Steering column electronics control unit |
| J533 | Data bus diagnostic interface |
| J538 | Fuel pump control unit |
| J623 | Engine control unit |
| J643 | Fuel supply relay |
| J682 | Terminal 50 voltage supply relay |
| T9b | 9-pin connector |
| T9p | 9-pin connector |
| T10v | 10-pin connector |
| T20a | 20-pin connector |
| T20d | 20-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| T94 | 94-pin connector |
| A41 | Positive connection (50), in dash panel wiring harness |
| B397 | Connection 1 (convenience CAN bus, high), in main wiring harness |
| B406 | Connection 1 (convenience CAN bus, low), in main wiring harness |
| * | According to equipment |
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