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

Model 220 

Fig 1: Identifying Wiring Harness Connection

Fig 2: Identifying Wiring Harness Location

1. Pass trailer coupling wiring harness (1) through hole under right taillamp from inside and seal with grommet (i).
2. Connect ground lead to ground point in right side of trunk (W7/1).
3. Route trailer coupling wiring harness (1) along existing cable to cable duct in rear wall (see arrow) and fasten.
4. Route branch-off line with 4-pin connector (1a) along trunk sill to left tail lamp and fasten to existing cables.
   Fig 3: Identifying Trailer Coupling Control Module

   
5. Route trailer coupling wiring harness (1) along existing cables to rear fuse box (F4) and fasten.
   Fig 4: Identifying Trailer Coupling Wiring Harness And Rear Fuse Box

   
6. Unplug 6-pin connector (1A) from rear SAM control module (N10/8) (see diagram bottom left).
7. Open 6-pin connector (1A), insert green cable (gn) into chamber 6 and white cable (ws) into chamber 5, and connect to rear SAM control module (N10/8).

   The green and white cables (gn, ws) are from the trailer coupling wiring harness (1).

8. Connect 2-pin white connector (K2) with black/red cable (sw/rt) to free socket in rear fuse and relay box (K40/5).

   The socket is outlined with white paint.

   Fig 5: Identifying Trailer Coupling Wiring Harness Connection

   
9. Connect ground lead to ground shielding for CAN/SAM in rear (W50/2) (see detail).
10. Position the single blue fuse housing for the fuse (54) and the double blue fuse housing for the fuses (55, 56) as shown in the diagram and install fuses as follows:
    • Fuse 54 with 10A rating (pink/red cable)
    • Fuse 56 with 30A rating (red/yellow cable)

    Fuse 55 with 30A rating (red/violet cable) should only be installed when towing a trailer. 

    Fig 6: Identifying Fuses Location

    
11. Route branch-off line with 4-pin connector (1a) behind left quarter panel to trailer coupling release (A63) and install in chamber 2 (see arrow in detail).
    Fig 7: Identifying Trailer Coupling And Connector

    
12. Route trailer coupling wiring harness with trailer coupling socket (X58) along the rear center panel and fasten to existing holes at four points (see arrows) using omega clips.

    Omega clips are included in the trailer coupling wiring harness.

13. The first omega clip is fastened to the right trailer coupling bracket (see detail).
    Fig 8: Locating Trailer Coupling Wiring Harness With Trailer Coupling

    
14. Position trailer coupling socket (X58) in socket carrier (10a) and push socket housing (10) onto trailer coupling socket (X58) and seal with grommet (10b).

    Ensure that the sealing fold of the grommet (10b) makes contact with the socket housing (10) without creasing.

    Fig 9: Identifying Socket Housing, Socket Carrier, Hitch Socket And Seal With Sleeve

    
15. Fasten trailer coupling socket (X58) to trailer coupling bracket with three 4.8x32 mm self-tapping screws.
    Fig 10: Identifying Trailer Coupling Socket Self-Tapping Screws