2. DuraMax
  3. TRAILER BRAKE CONTROL WIRING

DuraMax TRAILER BRAKE CONTROL WIRING User manual

  • Hello, I have analyzed the provided wiring schematic for the Trailer Brake Control system in a 2011 Chevrolet Silverado 2500 HD, specifically the JL1 Except 10 Series configuration. This document outlines the wiring connections for the TBCM, and related components, including the manual brake apply, gain adjustment, and display outputs. I'm ready to answer any specific questions you might have about the system or its components.
  • What is the TBCM?
    How many axles with electric brakes can the system support?
    What happens if the trailer is not compatible?
    What does the "SERVICE TRAILER BRAKE SYSTEM" message indicate?
2/12/22, 11:11 AM
Printer Friendly View
https://www1.prodemand.com/Print/Index?content=tabs&module=true&tab=true&terms=true&ymms=false&selectorMode=&className=
1/3
WIRING SCHEMATICS > TRAILER BRAKE CONTROL WIRING SCHEMATICS
Fig 1: Trailer Brake Control Wiring Schematic (JL1 Except 10 Series)
Courtesy of GENERAL MOTORS CORP.
YMMS: Feb 12, 2022
Engine:
6.6L Eng
License:
VIN: Odometer:
2011 Chevrolet Silverado 2500 HD
2/12/22, 11:11 AM
Printer Friendly View
https://www1.prodemand.com/Print/Index?content=tabs&module=true&tab=true&terms=true&ymms=false&selectorMode=&className=
2/3
Fig 2: Trailer Brake Control Wiring Schematic (JL1 Except 10 Series)
Courtesy of GENERAL MOTORS CORP.
DESCRIPTION AND OPERATION > TRAILER BRAKE CONTROLS DESCRIPTION AND
OPERATION
Some trucks less than 3900 Kg (8600 lb) GVW with a gasoline engine may be equipped with a Trailer
Brake Control Module (TBCM) or a combination Fuel Pump/Trailer Brake Control Module (FTCM)
system for electric trailer brakes. Some trucks greater than or equal to 3900 Kg (8600 lb) GVW may be
equipped with a integrated Trailer Brake Control Module (TBCM) system for electric trailer brakes. The
power output to the trailer brakes is based on the amount of brake pressure being applied in the
vehicle's brake system. The available power output to the trailer brakes can be adjusted to a wide range
of trailering situations.
NOTE: Connecting a trailer that is not compatible with the
trailer brake system may result in reduced or complete loss of
trailer braking. There may be an increase in stopping distance or
trailer instability which could result in personal injury or damage
to your vehicle, trailer, or other property. An aftermarket
2/12/22, 11:11 AM
Printer Friendly View
https://www1.prodemand.com/Print/Index?content=tabs&module=true&tab=true&terms=true&ymms=false&selectorMode=&className=
3/3
controller may be available for use with trailers with surge, air or
electric-over-hydraulic trailer brake systems. To determine the
type of brakes on your trailer and the availability of controllers,
check with your trailer manufacturer or dealer. Do not power-up
an aftermarket controller with the factory brake controller at the
same time.
The vehicle is equipped with the following trailer braking components:
Manual Trailer Brake Apply
Trailer Gain Adjustment
Trailer Brake Control Panel
Trailer Brake Driver Information Center Display
The Trailer Brake Control Module (TBCM) or a combination Fuel Pump/Trailer Brake Control Module
(FTCM) can support up to a maximum of 4 axles with electric trailer brakes (8 brake magnets).
DESCRIPTION AND OPERATION > TRAILER BRAKE CONTROLS DESCRIPTION AND
OPERATION > SERVICE TRAILER BRAKE SYSTEM
This message will be displayed when there is a problem with the trailer brake control system. If this
message persists over multiple ignition cycles there is a concern with the trailer brake system. Take your
vehicle to an authorized GM dealer to have the trailer brake system diagnosed and repaired.
DESCRIPTION AND OPERATION > TRAILER BRAKE CONTROLS DESCRIPTION AND
OPERATION > TRAILER GAIN AND OUTPUT DISPLAY
This display menu can be accessed by scrolling through the Driver Information Center menu, or any time
the trailer gain +/- button is depressed, or the manual trailer brake apply lever is actuated. The trailer
gain display is 0 to 10 in 0.5 step increments, and indicates the current user setting of the trailer output
gain. The trailer output is 0 to 10 bars in 1 bar increments, and indicates the output power provided to
the trailer brakes, relative to the gain setting.
/