Retrofit trailer hitch preinstallation wiring harness

AN31.19-S-8100-04E

Retrofit trailer hitch preinstallation wiring harness



Assignment of right footwell firewall fuse and relay module

GF54.15-S-1256-39TRA

Model

447.7## 1#

with code V23 (Interior panelling higher execution)

except code D57 (Partition wall, full-width at C-pillar with window)

except code E57 (Electrics for trailer socket)

Model

447.8## 1#

except code E57 (Electrics for trailer socket)

1

Preinstallation electrical wiring harness

4

Connector

5

Fuse housing

6

Electrical line

7

Electrical line

8

Ground cable

15

Electrical connector

Shown on MODEL 447.7 with CODE V23 (Interior trim, superior version)

1

Preinstallation electrical wiring harness

N28/1

Trailer recognition (AAG) control unit

2

Shield

1

Remove shield (2) from sliding door entrance.

2

Route preinstallation electrical wiring harness (1) as shown from installation location of trailer recognition control unit (N28/1) to passenger-side entrance area.

 Do not kink the preinstallation electrical wiring harness (1) and check it is routed without chafing.
This prevents damage.

 The electrical connectors (15) are connected to the trailer recognition (AAG) control unit (N28/1) after retrofitting the trailer hitch electrical wiring harness.

3

Secure preinstallation electrical wiring harness (1) section by section to factory-installed electrical wiring harness using cable ties.

4

Install shield (2) on sliding door entrance.

5

Route preinstallation electrical wiring harness (1) as shown in passenger-side entrance area.

 Do not kink the preinstallation electrical wiring harness (1) and check it is routed without chafing.
This prevents damage.

6

Secure preinstallation electrical wiring harness (1) section by section to factory-installed electrical wiring harness using cable ties.

1

Preinstallation electrical wiring harness

3

Electrical connector

4

Connector

5

Fuse housing

6

Electrical line

7

Electrical line

K40/11

Firewall fuse and relay module

N10/1

Signal acquisition and actuation module (SAM) control unit

X301

Interior CAN (CAN B) potential distributor electrical connector

7

Detach electrical connector (3) from signal acquisition and actuation module (SAM) control unit (N10/1).

8

Remove connector housing of electrical connector (3) and expose access to slots.

9

Install electrical line (7) in electrical connector (3).

 Slot assignment: Slot 30
Line colors: BKBU

10

Install connector (4) in interior CAN (CAN B) potential distributor electrical connector (X301).

11

Install fuse housing (5) and electrical lines (6) in firewall fuse and relay module (K40/11).

12

Remove right ventilation scoop (16) using  long wedge.

 Installation: The right ventilation scoop (16) is installed after attaching the ground line of the trailer hitch electrical wiring harness.

13

Unscrew nut on ground bolt (9).

 Installation: The nut on the ground bolt (9) is screwed on and torqued only after attaching the ground line of the trailer hitch electrical wiring harness.

14

Route ground line (8) from vehicle interior through cable opening in D-pillar to outside.

 Do not kink the ground line (8) and check it is routed without chafing.
This prevents damage.

15

Attach ground line (8) to ground bolt (9).

 Do not screw the nut onto the ground bolt (9) yet.