Table Of Contents; Introduction; Suggested Tools - Bosch Dexter Tow Assist Installation Manual

Introduction ................................................................2
Suggested Tools .................................................................2
Tow Assist Brake Control Module - "ECU" ............................3
Trailer Requirements ...................................................3
Wheel Speed Sensor Availability .........................................3
Chassis Rail Mounting Suitability ........................................3
Mounting Examples ............................................................3
Mounting ....................................................................3
Universal Bracket ...............................................................3
Mounting Location on the Trailer .........................................4
Mounting Orientation & Accuracy .......................................4
ECU Orientation Requirements ...........................................4
Recommended ECU Mounting Hardware ............................4
Recommended ECU Mounting Technique ............................4
Light Module Mounting Location .........................................5
Wiring .........................................................................5
Wire Identification & Correct Connection ............................5
Wheel Speed Sensor Connectors........................................5
Brake Magnet Connectors ..................................................5
Wiring Harness ............................................................5
Harness Routing Overview ..................................................6
Wire Harness Diagram with Breakaway Only .......................6
Wire Harness Diagram with On Board Battery .....................6
Power Harness ...................................................................7
Axle Harness ......................................................................7
Common Ground Wiring Point ............................................7
Additional Installation Steps ........................................8
ECU Initial Start Up ......................................................9
Valid Brake Signal from Brake Controller .............................9
Configuration Software ................................................9
Configuration File Setup .....................................................9
Configuration from Saved File ...........................................10
Verification Startup After Configuration .............................12
Advanced Software Capabilities .................................12
ECU Status.......................................................................12
System Faults ..................................................................12
Reference .................................................................13
Limited Warranty .......................................................14
ECU Mounting Template .............................................15
2021.01 | 2

Introduction

CAUTION
!
This is the safety alert symbol. It is used to alert you to potential
injury hazards. Obey all safety messages that follow this symbol to
avoid possible injury or death.
The purpose of this document is to detail the installation requirements
and guidelines for the Tow Assist. Detail within this document is provided
by Dexter as a guideline to the proper and correct installation for trailer
manufacturers and installers. This installation advice is based on the
design of the Tow Assist system and experience from system testing.
CAUTION
The Dexter Tow Assist system should only be installed by a qualified
technician.
Installation steps listed in this manual are not meant to cover every
trailer type, but provide the required elements needed to install the Tow
Assist successfully. Each trailer type may require steps not individually
stated but implied.
CAUTION
Please review and understand all installation manual instructions
before beginning installation. Many steps are sequential so it is
necessary to complete all elements as instructed.

Suggested Tools

ƒ Zip Ties
ƒ Wire/Cable Clamps (strain relief for wires at ECU)
ƒ Non-Abrasive Cleaner "Rubbing Alcohol" (for light installation)
ƒ Phillips Screwdriver/Drill Bit
ƒ 5/16" Nut Driver Bit
ƒ Drill & Drill Bits
ƒ Tape Measure
ƒ Side Cutters
ƒ 1-1/2" Hole Saw
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Assist Website
TOW ASSIST INSTALLATION MANUAL
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about the
Tow Assist System
ABS & SWAY MITIGATION SYSTEM