Ford 2009 F-550 v.1 Manuel d'utilisateur télécharger pdf (Page 267)

6. If the trailer wheels lock-up (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 lock-up. If towing a heavier trailer, trailer wheel lockup may

not be attainable even with the maximum GAIN setting of 10.

Explanation of instrument cluster warning messages:

The TBC interacts with the instrument cluster message center to display

the following messages:

TRAILER BRAKE MODULE FAULT: This message is displayed and

accompanied by a single chime, in response to faults sensed by the TBC.

In the event this message is seen, please contact your authorized dealer

as soon as possible for diagnosis and repair. The TBC may still function,

but performance may be degraded.

WIRING FAULT ON TRAILER: This message is displayed when a

Short circuit on the electric brake output wire has occurred. If the

WIRING FAULT ON TRAILER message is displayed and accompanied

by a single chime, 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., pulled

pin on trailer emergency break-away battery) or trailer brakes drawing

too much current.

Note: Your TBC can be diagnosed by your authorized dealer to

determine exactly which trailer fault has occurred; however, if the fault

is with the trailer this diagnosis is not covered under your Ford

warranty.

Points to Remember:

• Remember to adjust gain setting before using the TBC for the first

time.

• Readjust GAIN setting on the TBC (according to procedure above)

whenever road, weather and trailer or vehicle loading conditions

change from those that existed when the gain was initially set.

• The sliding lever on the TBC should be used only for manual

activation of trailer brakes to assist with proper adjustment of the

GAIN. Misuse, such as application during trailer sway, could cause

instability of trailer and/or tow vehicle.

• Avoid towing in adverse weather conditions. The TBC does not

provide anti-lock control of the trailer wheels. Trailer wheels can

lock-up on slippery surfaces, resulting in reduced stability of trailer

and tow vehicle.

2009 F-250/350/450/550 (f23)

Owners Guide, 1st Printing

USA (fus)

Tires, Wheels and Loading

267

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Ford 2009 F-550 v.1 Manuel d'utilisateur Page 267

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Ford 2009 F-550 v.1 Manuel d'utilisateur Page 267

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