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WARNING:The Ford TBC has only been verified to be
compatible with trailers having electric-actuated drum brakes
(one to four axles) and not hydraulic surge or electric-over-hydraulic
types. It is the responsibility of the customer to ensure that the trailer
brakes are adjusted appropriately, functioning normally and all electric
connections are properly made.
The TBC user interface consists of
the following:
1.OUTPUT bar graph:When the
vehicle’s brake pedal is pushed, or
when the manual control is
activated, blue bar indicators will
illuminate to indicate the amount of
power going to the trailer brakes
relative to the brake pedal or
manual control input.
2.Trailer connection indicator:This lamp indicates trailer electrical
connection status.
•When a successful trailer connection is detected, the indicator will be
blue. The display does not flash or turn off when a trailer is
connected.
•If the electrical connection is lost, the indicator will flash. If the
connection is lost while the vehicle is stationary, the indicator will turn
off 30 seconds after releasing the manual control and gain buttons.
Sliding the manual control or pressing the gain buttons while the
display is off will activate the flashing display for another 30 seconds
after releasing the manual control and gain buttons. If the connection
is lost while the vehicle is moving, the indicator will flash until the
ignition is turned off, or until the connection is reestablished. While
disconnected the manual control will not show any output bars.
•If no electrical connection is detected after the ignition is turned on,
pressing a GAIN adjustment button will display the GAIN setting for
five seconds after releasing the button and the trailer indicator will not
be displayed. Sliding the manual control will display the GAIN setting,
OUTPUT bar graph and the trailer indicator. All display items will be
flashing for five seconds after releasing the manual control and the
gain buttons (pressing a gain button while the display is flashing will
prolong the flashing until five seconds after releasing the gain button.
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3.GAIN setting display:Shows the current GAIN setting. This will
illuminate when a trailer is connected, flash if the trailer becomes
disconnected, or remain off if no trailer is connected.
4.+/– (GAIN adjustment buttons):Pressing these buttons will adjust
the TBC’s power output to the trailer brakes (in 0.5 increments). The
GAIN setting can be increased to a maximum of 10.0 or decreased to a
minimum of 0 (no trailer braking). Pressing and holding a button will
raise or lower the setting continuously. Continued pressing of a gain
button for five seconds after reaching a limit will reset the gain to the
previous setting.
5.Manual control lever:Slide the control lever to the left to activate
power to the trailer’s electric brakes independent of the tow vehicle’s
brakes (seeProcedure for adjusting GAINsection following for
instructions on proper use of this feature). If the manual control is
activated while the brake is also applied, the greater of the two inputs
determines the power sent to the trailer brakes.
•Stop Lamps:Activating the TBC manual control lever will illuminate
both the trailer brake lamps and the tow vehicle brake lamps except
the Center High-Mount Stop Lamp (presuming proper trailer electrical
connection). Pressing the vehicle brake pedal will also illuminate both
trailer and vehicle brake lamps.
GAIN:
The GAIN setting is used to set the TBC for the specific towing
condition and should be changed as towing conditions change. Changes
to towing conditions include trailer load, vehicle load, road conditions
and weather.
The GAIN should be set to provide the maximum trailer braking
assistance while ensuring the trailer wheels do not lock when braking.
Locked trailer wheels may lead to trailer instability.
Procedure for adjusting GAIN:
Note:This should only be performed in a traffic free environment at
speeds of approximately 20–25 mph (30–40 km/h).
1. Make sure the trailer brakes are in good working condition,
functioning normally, and properly adjusted. See your trailer dealer if
necessary.
2. Hook up the trailer and make the electrical connections according to
the trailer manufacturer’s instructions.
3. When a trailer with electric brakes is plugged in, the trailer connection
indicator will illuminate blue on the TBC and the GAIN setting display
will illuminate.
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4. Use the GAIN adjustment (+/–) buttons to increase or decrease the
GAIN setting to the desired starting point. A GAIN setting of 6.0 is a
good starting point for heavier loads.
5. In a traffic-free environment, tow the trailer on a dry, level surface at
a speed of 20–25 mph (30–40 km/h) and squeeze the manual control
lever completely.
6. If the trailer wheels lockup (indicated by squealing tires), reduce the
GAIN setting; if the trailer wheels turn freely, increase the GAIN setting.
Repeat Steps 5 and 6 until the GAIN setting is at a point just below
trailer-wheel lockup. If towing a heavier trailer, trailer wheel lockup
may not be attainable even with the maximum GAIN setting of 10.
Explanation of instrument cluster messages:
The TBC interacts with the instrument cluster message center. These
messages, accompanied by a single chime, will be displayed when the
TBC determines a malfunction in the trailer connection, TBC system, or
in the trailer. These messages are listed below:
TRAILER DISCONNECTED (if equipped with message center):
This message is displayed when a trailer connection was determined and
then a disconnection, either intentionally or unintentionally, has been
sensed during a given ignition cycle. It is also displayed if a trailer fault
occurs causing the trailer to appear disconnected. This message is also
displayed during manual activation without a trailer connected.
TRAILER BRAKE MODULE FAULT: This message is displayed in
response to faults sensed by the TBC. In the event this message is seen,
please take your vehicle to an authorized dealer for diagnosis and repair.
The TBC may still function, but performance may be degraded.
WIRING FAULT ON TRAILER: The TBC is capable of determining
certain faults in the vehicle wiring and trailer wiring/brake system. These
faults do not mean there is anything wrong with the TBC. This message
is displayed when one of the following faults has occurred:
•Short circuit on the electric brake output wire:If theWIRING
FAULT ON TRAILERmessage is displayed with no trailer connected,
the problem is with the vehicle wiring from the TBC to the 7–pin
connector in the bumper. If the message is only displayed with a
trailer connected, the problem is related to the trailer wiring; consult
your trailer dealer for assistance. This can be a short to ground (i.e.,
chaffed wire) or a short to voltage (i.e., a pulled pin on trailer
emergency break-away battery) or trailer brakes drawing too much
current.
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Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
11 10A Not used (spare)
12 7.5A Power mirror switch, Memory seat
module microprocessor power,
Steering column switch
13 5A SYNC
14 10A Not used (spare)
15 10A Climate control
16 15A Ignition switch feed
17 20A All lock motor feeds
18 20A Driver memory seat switch
19 25A Not used (spare)
20 15A Adjustable pedals, Datalink
21 15A Fog lamps, Fog lamp indicator
22 15A Park lamps, Side marker lamps
23 15A High beam headlamps
24 20A Horn
25 10A Interior demand lamps, Mid box
power feed
26 10A Instrument panel cluster, Key out
inhibit solenoid, Radio info display
(CID), Radio buttons, Key-in
chime
27 20A Not used
28 5A Radio muting
29 5A Instrument panel cluster
30 5A Passenger airbag disable indicator
31 10A Restraints control module
32 10A Non-integrated compass module,
Heated-only seat module
33 10A Trailer brake controller
34 5A Electronic locking differential
indicator
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