Retrofit trailer hitch preinstallation wiring harness

AN31.19-S-8100-04EA

Retrofit trailer hitch preinstallation wiring harness



Assignment of right footwell firewall fuse and relay module

GF54.15-S-1256-39TRA

Model

447.6## 1#

except code E57 (Electrics for trailer socket)

Model

447.7## 1#

except code E57 (Electrics for trailer socket)

except code V23 (Interior panelling higher execution)

Model

447.7## 1#

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

with code V23 (Interior panelling higher execution)

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 447.6 with CODE D51 (Full-width partition wall with 1 window) without CODE SH9 (Windowbag for driver and front passenger)

1

Preinstallation electrical wiring harness

15

Electrical connector

13

Partition wall

K40/11

Firewall fuse and relay module

14

Front headliner

N10/1

Signal acquisition and actuation module (SAM) control unit

1

Route preinstallation electrical wiring harness (1) as shown via right roof paneling, under front headliner (14) up to passenger-side footwell.

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

 Make sure that the preinstallation electrical wiring harness (1) does not touch the front headliner (14).
This will prevent interference.

 To do this, pass the preinstallation electrical wiring harness (1) through the opening in the partition wall (13) at the top.

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

2

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

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

3

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

4

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

5

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

 Slot assignment: Slot 30
Line colors: BKBU

6

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

7

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

8

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

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

9

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.

10

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.

11

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

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