Ford 2008 F-550 v.3 Manuel d'utilisateur télécharger pdf (Page 246)

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 green on the TBC and the GAIN setting display

will illuminate.

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 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 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:

2008 F-250/350/450/550 (f23)

Owners Guide (post-2002-fmt)

USA (fus)

Tires, Wheels and Loading

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Ford 2008 F-550 v.3 Manuel d'utilisateur Page 246

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Ford 2008 F-550 v.3 Manuel d'utilisateur Page 246

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