Socket pin assignment
Pin
Circuit
1
Indicator lamp, left-hand side
2
Rear fog lamp
3
Ground
4
Indicator lamp, right-hand side
5
Tail light, right-hand side
6
Stop lamp
7
Tail light, left-hand side
8
Back-up light
9
Constant plus
10
Charging lead
11
Ground (circuit 10)
12
--
13
Ground (circuit 9)
22
Wire Colour
black/white
white
brown
black/green
gray/red
black/red
gray/black
green
red
yellow
brown/white
--
brown
313 176 391 102 - 003 - 09/13
Installation instructions:
Electrical system for towing hitch
possible deviations
green/white in case of 7-
pin
Vito/Viano ab 2003