2021.01 | 6
TOW ASSIST INSTALLATION MANUAL
ABS & SWAY MITIGATION SYSTEM
ECU
ECU Power
Supply Fuse
Brake Request Wire Lead
Indicator Lamp Harness
Ground Wire Lead
Magnet Output Harness
Wheel Speed Sensor Harness
ECU Power Supply Routing
Harness Routing Overview
Diagram for Tow Assist wiring only. Additional wiring to connect the tow vehicle is still required. This is for illustration only, not exact routing locations.
Signal
Connections
Start Point
End Point
Power Supply
Positive
Trailer Power
Supply
ECU Connector
Negative
Trailer Power
Supply
Common
Ground Point
Indicator Light
Operation
Signal Warning
Signal Ground
ECU Connector LED Module
Brake Request
Service Brake
Wire (from tow
vehicle EBC)
Tow Vehicle
Brake Signal
(Trailer Plug)
ECU Connector
Wheel Speed
Sensors
Wheel Speed
Signal/Power
(1-6)
ECU Connector
Wheel Speed
Sensor (1-6)
Magnet Brake
Brake Magnet
Signal (1-6)
ECU Connector
Brake Magnet
(1-6)
Common
Ground Point
ECU Ground
ECU Connector
Common
Ground Point
Brake Magnet
Signal (1-6)
Brake Magnet
(1-6)
Common
Ground Point
Trailer Supply
Ground
Trailer Power
Supply (on-
board battery
or tow vehicle
power
Common
Ground Point
Wire Harness Diagram with Breakaway Only
*ECU not powered during breakaway feed through braking
Junction
Box
Red (Battery Fused)
30A
Tow
Assist
Power
Harness
7 Circuit Plug
Black - Battery Charge
Breakaway
Switch
Breakaway
Battery
Charger
Blue (Brake Req)
Blue (Brake)
White (Ground)
White (Ground)
Lanyard
Wire Harness Diagram with On Board Battery
Junction
Box
Red (Battery Fused)
30A
Tow
Assist
Power
Harness
7 Circuit Plug
Black - Battery Charge
Breakaway
Switch
On Board Battery
Charger
Blue (Brake Req)
Blue (Brake)
White (Ground)
White (Ground)
Lanyard
When routing the wiring harness, take care that the wiring harness is not
damaged by routing via sharp corners or edges.
Make sure that the wiring harness is fixed after each connector at the
ECU as described in the power harness section.