When your dashboard displays “Service Trailer Brake System,” this could indicate a
problem with your trailer braking system – however, most likely you can resolve this yourself!
Resetting isn’t difficult and only requires a few tools – learn more now!
Brake Master Cylinder
Trailer brakes are controlled by a master cylinder which uses momentum from your
truck to decelerate and stop your trailer. It works based on one simple principle: as
more pressure is applied to the system, faster and harder will its brakes stop working.
When your dashboard shows “service trailer brake system”, this often indicates
there is an issue with either your module or wiring that prevents power from
reaching it and may lead to your brakes failing, creating a serious safety risk.
To rectify this problem, locate and replace the fuse for the brake controller in your
truck’s fuse panel or power distribution center. It should be labeled either the RT or
LT fuse; once found, replace it with a new one to solve this issue. If it continues to
blow again, there may be larger issues with its wiring or your controller itself; TRW
Aftermarket brake master cylinder range provides premium quality products to
garages, installers and end users who seek maximum vehicle safety.
Brake Lines
If the message ‘Service Trailer Brake System’ pops up on your truck, it could be an
indicator of bigger problems. To prevent a breakdown, it’s a good idea to inspect all
components associated with this system – here’s what to look out for:
One of the primary sources of trailer brake issues is a blown fuse, as this piece of
wiring monitors power to your trailer brakes and its failure will create this warning
light. You can find this fuse at your power distribution center located either under
your hood or to one side of your dashboard.
Once you’ve located the fuse, replace it with a new one to restore service without
warning lights. Also check your trailer RT or LT fuses as any blown ones could
indicate other issues with the system that require more attention.
Brake Pedal
Your trailer brake control unit and system is an integral component of your vehicle’s
ability to tow a trailer safely, but over time this system can become worn-out due to
exposure to corrosion, binding or wire deterioration – this may result in you receiving
an “service trailer brake system” warning on the dashboard which must be
addressed before your truck can safely tow your trailer again.
Do not ignore this message, as it could result in serious accidents. Instead, follow
these guidelines to fix this problem quickly and effectively.
Step one is to locate the adjustment nut located on the rear side of your trailer brake
controller, loosen the locknut holding it down with a flathead screwdriver, and slowly
turn clockwise against its backing plate until loose – avoid overtightening to avoid complications!
Brake Controller
A brake controller is an electronic device that sends an electronic signal to your
trailer’s brakes when you apply them on your truck, activating an amount set by you
– when this occurs it triggers the system and releases that amount of power based
on how and when it was applied by you. Furthermore, this controller has a sync dial
to allow for adjustments of both braking force and timing of your trailer brakes.
As soon as your brake control lights illuminate, it is crucial that you understand their
function. An illuminated warning light signals a problem within the system which
could result in an accident if left unresolved immediately.
Resetting the brake control when you receive this message shouldn’t be a difficult
process. Simply gather up some basic tools such as a flathead screwdriver and
strong hammer. In addition, a fuse should also be located within your power
distribution center to monitor electrical current and block out excess voltage from
circulating through your system.