BMW F34 - Step 35-37: Trailer Hitch Wiring and Color Codes; Trailer Hitch Connection and Wire Key

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35
36  37
1 ye
2 bk
3 wh
4 gn
5 bu
6 rd
7 bn
37 bk wh gy gn rd bu ye bn pu or no
black white grey green red blue yellow brown purple orange
not
occupied