Connect wiring harness - AN31.19-P-8080-03FFB

Vehicles with Parktronic system (code 220) 

1. 1. Remove grommet (16) (is no longer needed).

      Connection schematic for wiring harness 

      Fig 1: Connection Schematic For Wiring Harness

      

   Routing diagram for wiring harness 

   Fig 2: Routing Diagram For Wiring Harness

   

   

   On vehicles with Parktronic system (PTS ) code 220 the following steps must be carried out on the trailer hitch wiring harness before routing the trailer hitch wiring harness outside the vehicle: 

Vehicles with ORIS wiring harness 

2. 1. • 1.5 meters (0.75 mm² ) Adapt the brown/white line (9) to the looped brown/white cable branch-off line using a voltage distributor (br/ws).

      On vehicles without Parktronic system the looped brown/white cable branch-off line (br/ws) is tied back at the battery and fixed in position on the vehicle's own wiring harness.

      Fig 3: Identifying Voltage Distributor And Brown\White Line

      

   Vehicles with Westfalia wiring harness 

   2. • Expose the brown/white line (br/ws) from the trailer hitch wiring harness (1) (see Figure below).
      • 4 meters (0.75 mm² ) Adapt brown/white line (9) to the exposed brown/white cable branch-off line (br/ws) using a voltage distributor.
        Fig 4: Identifying Trailer Hitch Wiring Harness And Brown\White Line

        
3. Place trailer coupling wiring harness (1) with branch-off line to trailer coupling socket in the spare wheel recess.
4. Connect the brown line (br) to ground (left taillamp in luggage compartment)(W6/1)(see magnified section).
5. Route trailer hitch wiring harness (1) along the rear end center assembly to the hole (22) and fix in position.

   Fasten wiring harness to longitudinal member using a wide felt tape.

   Fig 5: Identifying Trailer Hitch Wiring Harness, Brown\White Line And Rear End Center Assembly Hole

   

Vehicles with Parktronic system (code 220) 

6. 1. • Slit the grommet (16) and insert the trailer hitch wiring harness (1) into the grommet (16).
      • Reinstall the grommet (16) and seal with Terrastat for example.

   Vehicles without Parktronic system (code 220) 

   2. • Mark center of hole from end of rear cross member and from floor panel of connection longitudinal member down onto spare wheel well.
      • Drill hole to dia. 38 mm.
        Fig 6: Identifying Trailer Hitch Wiring Harness And Grommet

        
      • Route the trailer hitch wiring harness (1) with grommet (17) through the hole and seal in the spare wheel well with grommet (18).
7. Insert 3-pin coupling and 13-pin coupling from the trailer hitch wiring harness (1) into socket housing (10) and seal with grommet (17).

   It should be ensured that the sealing lip of the grommet (17) abuts the socket housing (10) without any creases.

8. Fasten socket housing (10) to the bracket (19) of the trailer hitch using three 4.8 x 32 mm sheet metal screws
9. Fasten trailer hitch wiring harness (1) to bracket (19) using Omega clip (see arrow in Figure on top left).

   Shown on model 203 

   Fig 7: Identifying Trailer Hitch Wiring Harness, Grommet, Socket Housing And Bracket

   
10. Widen recess clearance to dimensions in shield
    Fig 8: Identifying Shield Dimensions Clearance

    
11. Route trailer coupling wiring harness (1) along existing wiring to control module rack on left wheelhouse and fix in place (figure on left).
12. Route trailer hitch wiring harness (1) under the control module carrier (see Figure on right) and through the opening on the left next to the seat backrest and fix in position.
    Fig 9: Identifying Trailer Hitch Wiring Harness, Hole, Ground (Left Taillamp In Trunk)

    
13. Route trailer hitch wiring harness (1) along the vehicle's own wiring harnesses over the left wheelhouse to the left cable duct and fix in position up to the branchoff line (see arrow in Figure on right).
14. Route cable branch-off lines, red/blue (rt/ bl) and brown/white (br/ws) to rear fuse box (F4).
15. Fasten lines with adhesive pads supplied and tie straps (Figure on left).
    Fig 10: Identifying Trailer Hitch Wiring Harness, Rear Fuse Box And Fuse Block

    

Vehicles without fuse block (B) 

16. 1. • Insert the fuse block (B) supplied
       • Insert plug of red auxiliary line (rt) in the free chamber E of the plug position 12 in the fuse block (B) (see magnified section on right).
       • Route red line (rt) along the vehicle's own wiring harness to the positive battery terminal and fix in position.
       • Fasten the cable lug of the red line (rt) to the positive battery terminal (see magnified section on the left).
         Fig 11: Identifying Fuse Block And Red Line

         

All vehicles 

17. Insert red/blue line (rt/bl) in the free chamber D of the plug position 12 in the fuse block (B).
    Fig 12: Identifying Fuse Block And Rear Fuse Box

    
18. Assign fuse position 12 with a 25A fuse (arrow).

    It should be pointed out to the customer that fuse 12 must only be fitted when towing a trailer, otherwise a remote consumer could discharge the battery.

    Fig 13: Identifying Rear Fuse Box

    
19. Route the brown/white line (br/ws) with plug-in sleeve behind the rear fuse box (F4) to the pneumatic control unit with combined functions (A37).
20. Detach and open white coupling of pneumatic control unit with combined functions (A37) (see magnified section).
21. Insert brown/white line (br/ws) with plug-in sleeve in the free chamber 15 of the white coupling (see arrow)

    If chamber 15 is assigned, adapt brown/white line (br/ws) to the line from chamber 15 using the voltage distributor Remove plug-in sleeve  ).

    Fig 14: Locating White Coupling

    
22. Expose black/green line (sw/gn) and black/white line (sw/ws) from the cable duct and check with multimeter signal.

    Left rear turn signal lamp has cable color black/green (sw/gn), Right rear turn signal lamp has cable color black/white (sw/ws).

    Fig 15: Identifying Cable Harness For Trailer Hitch

    
23. Connect the black/green line (sw/gn) from the trailer hitch wiring harness (1) to the black/ green line (right rear turn signal lamp) by means of a voltage distributor (see magnified section).
24. Connect black/white line (sw/ws) from the trailer hitch wiring harness (1) to the black/white line (left rear turn signal lamp) by means of a voltage distributor (see magnified section).
    Fig 16: Identifying Trailer Hitch Wiring Harness And Black\Green Line

    

Vehicles with Westfalia wiring harness 

25. 1. • Expose gray/green line (gr/gn) for rear fog lamp from the cable duct and cut through.
       • Connect green/white line end (gn/ws) from the trailer hitch wiring harness (1) with a voltage distributor to the gray/green line end (gr/gn) which comes from the light module (N7-1)
       • Connect gray/green line end (gr/gn) from the trailer hitch wiring harness (1) with a voltage distributor to the gray/green line end (gr/gn) which goes to the left taillamp (E3)
         Fig 17: Identifying Trailer Hitch Wiring Harness, Gray\Green Line And Left Taillamp

         

    For all vehicles with ORIS wiring harness 

    2. • Expose gray/green line (gr/gn) for rear fog lamp from the cable duct and cut through.
       • Release the gray/green line (gr/gn) attached to the wiring harness with flat plug bushings attached on both sides from the trailer hitch wiring harness and cut through in the center
         Fig 18: Identifying Gray\Green Line

         
       • In each case connect a gray/green line for the vehicle's own wiring harness by means of a voltage distributor to the line ends of the flat plug bushings.
       • Connect the relay enclosed as follows:
         • a Adapt the gray/green line from the vehicle's own wiring harness, coming from the light module, to circuit 86.
         • a Adapt the gray/green line from the vehicle's own wiring harness, going to the left taillamp, to circuit 87a.
         • a Adapt the gray/green line of the trailer hitch wiring harness to circuit 85.
       • Clip the relay into the right rear cable duct.
         Fig 19: Identifying Gray\Green Line

         
26. Route the trailer hitch wiring harness (1) along the cable duct to the left A-pillar.
27. Route the black 10-pin coupling to the light module (N7-1) behind the exterior lamp switch (26) and fit into a free chamber.

    Coupling is coded.

    Fig 20: Identifying Trailer Hitch Wiring Harness And Exterior Lamp Switch

    

Vehicles with Parktronic system (code 220) 

28. 1. Route the brown/white extended line (br/ws) in the cable duct from the battery to the right footrest.
       Fig 21: Identifying Brown\White Line

       
29. Expose the brown/white line (br/ws) from the Parktronic system from the wiring harness as per the Figure.
    Fig 22: Identifying Brown\White Line And PTS Control Module

    
30. Connect brown/white line (br/ws) from the trailer hitch wiring harness and brown/white line (br/ ws) from the Parktronic system wiring harness to a voltage distributor.
31. Fix lines in position on the vehicle's own wiring harness.
    Fig 23: Identifying Brown\White Line

    
32. Place bracket (10) into spare wheel.
33. Place ball head (12) into recess clearance of (10) (figure on left).
34. Glue operating instructions plate (13) onto the trunk sill (figure on right).
    Fig 24: Identifying Bracket And Ball Head

    
    Fig 25: Identifying Instruction Plate

    
35. Insert the plugs supplied into holes (2l) and (2r).
    Fig 26: Identifying Plug Holes