When your Silverado with trailer is equipped with the Service Brake System warning
message on its dashboard, this indicates a malfunction with its ITBC (integrated
trailer brake controller) – typically due to module malfunction or wiring problems
preventing electricity from flowing freely.
Unfortunately, fixing this problem should be straightforward. All it requires are some
basic tools, like a flathead screwdriver and hammer.
Fuse
If the service trailer brake system warning message appears, this indicates
something is amiss with either its wiring or module and you should wait to connect
your trailer until it has been resolved – otherwise an accident could occur and cause
irreparable damage to both vehicle and trailer.
This message could be caused by any number of factors, such as a malfunctioning
controller, brake light switch or poor ground. Therefore, it’s vital that all these parts
are working as they should.
Start by disabling the trailer brakes; disconnecting the brake controller is an easy
way to do this. Alternatively, cut a wire somewhere between your controller and
brakes that runs from it to stop electric flow through to stop flow of electricity
through and reset system.
Relay
No trailer brake controller is immune from problems, and one of the most frequent
issues is a relay that has stopped functioning correctly, stopping electricity or power
from passing through its circuits. Fixing this is easy if you know what steps to take.
First step would be disconnecting cable from brake controller – this will stop brakes
activating while reseting system.
Next, locate the adjustment nut on the brake – typically on the rear side near axle –
using a flat screwdriver to loosen it with penetrating oil aiding this process. When
this has been accomplished you can then begin turning clockwise to tighten or
loosen as necessary and test again once completed.
Wiring
If your truck’s dashboard displays a “Service Trailer Brake System” message, that indicates an issue with its trailer brake controller or module. This indicates something is blocking electricity or power from reaching it and reaching your brake controller.
A trailer braking system is intended to provide a smooth driving experience while
towing loads, yet is vulnerable to corrosion, seizure and wire deterioration.
Therefore, regular maintenance of this system is crucial; otherwise you could find
yourself dealing with big headaches on the road! Often these problems are
straightforward to diagnose and repair with replacing fuse or switches being all
that’s required; otherwise it might mean replacing an entire controller which you can
do yourself or with some help from an assistant at home.
Adjustment
One of the main factors causing service trailer brake systems to activate is a blown
fuse, as this controls power to the entire electrical system and, should it break,
prevents signals from reaching their destinations. Be sure to review your owner’s
manual and replace any blown fuses as soon as possible.
If this problem occurs, the first step should be disconnecting your trailer to prevent
electricity from reaching the brake controller. Next, use a flat screwdriver to loosen
the lock nut that holds onto the adjusting nut before rotating it clockwise with the
screwdriver – but be cautious not to over tighten or damage your brakes! Although
this won’t fix anything immediately, but at least will stop any warning messages
from appearing; otherwise you should consult with an expert.