Why does my Chevy say service trailer brake system?
Why does my Chevy say service trailer brake system?
In some cases, when the trailer mounted sway module activates, it could cause the vehicle to set DTC C1114, and display the “Service Trailer Brake System” message on the DIC. This could be an indication that the trailer brakes are no longer functioning.
Why does my Silverado keep saying check trailer wiring?
It could be either the truck and/or trailer side of the connector. Since the Trailer Brake Control Module is always monitoring the vehicle and trailer circuits/components, a poor connection at the 7-way connector can cause a “Check Trailer Wiring” message on the DIC.
Is there a fuse for the trailer brake system?
If the trailer brakes will operate with the manual switch, but not when the truck brakes are applied, check the CHMSL fuse in the fuse box under the hood. The lid to the fuse box will have a legend that will help you locate the fuse. Your trailer brakes might simply need adjusting.
What does it mean when it says service brake system?
Service-brake system means the electrical, mechanical, hydraulic, or air brake components used to slow or stop a vehicle in motion.
How do I know if my brake controller is bad?
Use a circuit tester, and check the red wire that exits the rear of the controller. This wire should only go hot when the brake pedal is pressed. If this checks out ok, then the controller is bad and must be replaced.
How do you test a Chevy trailer brake controller?
Press down on the brake pedal while watching the brake controller. The display on the controller should light up and hold a relatively steady reading, which should not vary by more than 1/10 of a volt up and down. It may be necessary to turn the ignition key to the “On” position for this step.
What causes trailer brakes to not work?
First, check the vehicle and trailer connectors for corrosion. If there is a bad ground connection the trailer brakes will not work. Next, check the brake controller wiring. Sever the blue brake output wire, leaving enough room to splice it back together when testing is done and then apply the manual slide.
What is the Chmsl fuse?
CHMSL = Center High Mounted Stop Light (or Lamp, if you so prefer). A GM lighting technology, the Center High Mounted Stop Lamp is the horizontal stop light that typically sits at or near the top of a vehicle, and helps following vehicles better see a vehicle that’s applying its brakes and slowing.
