Vw Electrics rear lighting wire colours

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T7 Round 7 pin connector in junction box on front left hand side of the engine bay that handles Lighting

T7 7 Earth from T7a, the other round pin connector, the earth point is made on the engine bay wall on the left hand side. This can be dirty and corroded and can lead to intermittent electrical faults and dim rear lights.

T7 6 grey/red tail light right

T7 5 grey/black tail light left

T7 4 black/blue reverse light

T7 3 black/red brake light

T7 2 black/green rear right turn signal

T7 1 black/white rear left turn signal

grey/white is fog light single connector in black box