Ford TRANSIT 2015 Owner's Manual page 171

5. If the trailer wheels lock, indicated by
squealing tires, reduce the gain setting.
If the trailer wheels turn freely, increase
the gain setting. Repeat steps four and
five until the gain setting is at a point
System Warning Messages
Message
Trailer Brake Module
Fault
Wiring Fault on Trailer
Note: An authorized dealer can diagnose the trailer brake controller to determine exactly
which trailer fault has occurred. However, the Ford Warranty does not cover this diagnosis
if the fault is with the trailer.
Points to Remember
• Do not attempt removal of the trailer
brake controller without consulting the
Workshop Manual. Damage to the unit
may result.
• Adjust gain setting before using the
trailer brake controller for the first time.
• Adjust gain setting, using the procedure
above, whenever road, weather and
trailer or vehicle loading conditions
change from when the gain was initially
set.
Transit (TTH) Canada/United States of America, enUSA, Edition date: 03/2014
Towing
Action and Description
Displays in response to faults sensed by the trailer brake
controller, accompanied by a single tone. If this message
appears, contact an authorized dealer as soon as possible
for diagnosis and repair. The controller may still function, but
performance may be degraded.
Displays when there is a short circuit on the electric brake
output wire. If the message displays, accompanied by a single
tone, with no trailer connected, the problem is with your
vehicle wiring between the trailer brake controller and the 7-
pin connector. If the message only displays with a trailer
connected, the problem is with the trailer wiring. Consult a
trailer dealer for assistance. This can be a short to ground,
for example a chaffed wire, short to voltage, for example a
pulled pin on trailer emergency breakaway battery or the
trailer brakes may be drawing too much current.
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just below trailer wheel lock. If towing
a heavier trailer, trailer wheel lock may
not be attainable even with the
maximum gain setting of 10.
Only use the manual control lever for
correct adjustment of the gain during
trailer setup. Misuse, such as
application during trailer sway, could
cause instability of trailer or tow
vehicle.
Avoid towing in adverse weather
conditions. The trailer brake controller
does not provide anti-lock control of
the trailer wheels. Trailer wheels can
lock up on slippery surfaces, resulting
in instability of trailer or tow vehicle.