ML 320 (163.154) V6-3.2L (112.942) (1998)
Trailer Connector: Technical Service Bulletins
Brakes - Trailer Brake Controler Wiring Procedure
Date: August 1999
Order No.: T-SI-MBUSA-31.19/03
Supersedes:
Group: 31
SUBJECT:
MODEL 163
RECOMMENDED WIRING PROCEDURE DURING BRAKE CONTROLLER INSTALLATION
IMPORTANT!
This document is only to be used as a guide for locating the recommended point at which to connect an electric brake controller to an M-Class
vehicle's brake lamp circuit and trailer socket. There are various makes and models of brake controllers on the market and none have been tested or
approved for use by Mercedes-Benz. Further, all work of this type must be performed in strict accordance to the installation instructions and set up
procedures as supplied by the brake controller manufacturer.
Procedure
1.
Locate the 3-wire to 2-wire converter (N28, Figure 1) that is built into the wiring harness supplied with the trailer hitch kit (part no. Q6 31 0002).
2.
Cut the orange circuit # 1660 wire (A) at a point after N28, but before the point the harness exits the vehicle through the grommet.
3.
The end of the orange wire # 1660 that comes from N26 should be connected to a new wire (B) and run to the brake controller. This wire supplies