Wiring diagram for trailer hitch
| Designation of parts | Current line | |
| E | to the turn signal switch | 11, 16, 17, 21 |
| F | to the brake light switch | 2 |
| F4 | to the switch for the lights that illuminate the path when the car is reversing | 4 |
| J20 | trailer turn signal relay | 17, 19 |
| K3 | to the turn signal indicator light | 18 |
| K18 | trailer turn signal indicator light | 24 |
| M1 | to the parking light, left | 8 |
| M2 | right rear light bulb | 20 |
| M4 | left rear light bulb | 7 |
| M5 | to the turn signal lamp, front, left | 8 |
| M6 | direction indicator lamp rear, left | 5 |
| M7 | to the turn signal lamp, front, right | 23 |
| M8 | rear turn signal lamp, right | 22 |
| M9 | brake light bulb left | 1 |
| M10 | brake light bulb right | 10 |
| M16 | left reversing light bulb | 3 |
| M17 | right reversing light bulb | 17 |
| S13, S14 | fuses in the central part | |
| T1a | plug connection in the trunk at the rear, left | |
| T1b | plug connection in the trunk at the rear, on the right | |
| U | trailer socket | 9, 10 |
| X | to the rear license plate lights | 3 |
The information is available on the website (VWmanual)
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