2008 Ford F250 Owner Guide 4th Printing - Page 247

Tires, Wheels and Loading 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. +/- (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. 2. Trailer connection indicator: This lamp indicates trailer electrical connection status. • When a successful trailer connection is detected, the indicator will be green. • If the electrical connection is lost, the indicator will flash red. If the connection is lost while the vehicle is stationary, the indicator will turn off after 30 seconds. If the connection is lost while the vehicle is moving, the indicator will flash until the ignition is turned off, then on again or if there is a reconnection. • If no electrical connection is detected after the ignition is turned on, pressing a GAIN adjustment button will display the GAIN setting. Sliding the manual control will display the GAIN setting, OUTPUT bar graph and light the trailer indicator red. 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. OUTPUT bar graph: When the vehicle's brake pedal is pushed, or when the manual control is activated, green bar indicators will illuminate to indicate the amount of power going to the trailer brakes relative to the brake pedal or manual control input. 247 2008 F-250/350/450/550 (f23) Owners Guide (post-2002-fmt) USA (fus)