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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
Positive
Power Supply
Negative
Operation
Indicator Light
Signal Warning
Signal Ground
Service Brake
Brake Request
Wire (from tow
vehicle EBC)
Wheel Speed
Wheel Speed
Signal/Power
Sensors
(1-6)
Brake Magnet
Magnet Brake
Signal (1-6)
ECU Ground
Brake Magnet
Signal (1-6)
Common
Ground Point
Trailer Supply
Ground
2021.01 | 6
ECU
Start Point
End Point
Trailer Power
ECU Connector
Supply
Trailer Power
Common
Supply
Ground Point
ECU Connector LED Module
Tow Vehicle
Brake Signal
ECU Connector
(Trailer Plug)
Wheel Speed
ECU Connector
Sensor (1-6)
Brake Magnet
ECU Connector
(1-6)
Common
ECU Connector
Ground Point
Brake Magnet
Common
(1-6)
Ground Point
Trailer Power
Supply (on-
Common
board battery
Ground Point
or tow vehicle
power
Wire Harness Diagram with Breakaway Only
*ECU not powered during breakaway feed through braking
Junction
Box
Black - Battery Charge
7 Circuit Plug
Lanyard
Breakaway
Switch
Blue (Brake)
White (Ground)
Wire Harness Diagram with On Board Battery
Junction
Box
Black - Battery Charge
7 Circuit Plug
Lanyard
Breakaway
Switch
Blue (Brake)
White (Ground)
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.
TOW ASSIST INSTALLATION MANUAL
Brake Request Wire Lead
Indicator Lamp Harness
Ground Wire Lead
Magnet Output Harness
Wheel Speed Sensor Harness
ECU Power Supply Routing
ECU Power
Supply Fuse
Red (Battery Fused)
30A
Charger
Breakaway
Battery
Tow
Assist
Power
Harness
Blue (Brake Req)
White (Ground)
Red (Battery Fused)
30A
Charger
On Board Battery
Tow
Assist
Power
Harness
Blue (Brake Req)
White (Ground)
ABS & SWAY MITIGATION SYSTEM
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