Trailering Systems 2-65
Simulated Trailer Brakes
Creating a tool to simulate trailer brakes can be used to
diagnose trailer brake issues.
The trailer brake control system is compatible with two
types of trailer brake systems: electromag netic or
electro-over hydraulic trailer brakes. The Brake System
Control Module must determine which type of brakes
the trailer is equipped with so the system can output
correctly for the trailer's brake system. Because the
Brake System Control Module has to determine the
type of trailer brake system that is being used, it can be
sensitive to a variety of trailer wiring issues.
The Trailer Brake Control Module continuously sends a
test pulse out on the trailer brake control circuit (circuit
47) to determine if a trailer with trailer brakes has been
connected. How the pulse reacts when a trailer is
connected is how the Trailer Brake Control Module
determines which type of braking system the trailer is
equipped with.
Even after the system detects the trailer, Trailer Brake
Control Module will continue to send this test pulse on
the trailer brake control circuit, which now is monitoring
both the truck and trailer circuitry. The trailer brake
control circuit continues to be monitored for any faults
so the driver can be notified of any issues that may
occur within the truck or trailer, as well as, to determine
when the trailer is disconnected from the truck.
Creating a Simulated Trailer Brake Tool
Parts needed:
• 7-way RV trailer connector Qty: 1
• Electric trailer brake magnets Qty: 2, 4, 6, or 8
• Reverse lamp Qty: 1
• Mounting board Qty: 1
• 12 gauge wire and terminals/connectors Qty: As
needed
1. Connect a 12 gauge wire to the ground terminal of
the 7-way trailer connector.
2. Connect a 12 gauge wire to the brake controller
output terminal of the 7-way trailer connector.
Note: The trailer brake magnets must be
connected in parallel. Connecting in series will
create an excessive current draw and disable the
trailer brake system.
3. Connect the trailer brake magnets to the 12 gauge
wires from the 7-way trailer connector in parallel.
Note: A combination trailer lighting and trailer
brake tool can be created on the same mounting
board.
4. Mount the trailer brake magnets to the mounting
board.
5. Plug the 7-way RV trailer connector to the vehicle
and verify functionality.
2022 - Silverado 1500 (New) Electrical Body Builder Manual
To Next Page
Loading...