2011 Ford F450 Super Duty Crew Cab Owner Guide 4th Printing - Page 19

Instrument Cluster AdvanceTrac௡/Traction control (if equipped): Displays when the AdvanceTrac௡/Traction control is active. If the light remains on, have the system serviced immediately, refer to the Driving chapter for more information. AdvanceTrac௡/Traction control off light (if equipped): Illuminates when AdvanceTrac௡/Traction control has been disabled by the driver. OFF Refer to the Driving chapter for more information. 4X2 (RTT) (if equipped): Displays momentarily when 4x2 two-wheel drive high is selected. If the light fails to display when the ignition is turned on, or remains on, have the system serviced immediately by your authorized dealer. Four wheel drive low (RTT and 4x4 static) (if equipped): Displays LOW when four-wheel drive low is engaged. If the light fails to display when the ignition is turned on, or remains on, have the system serviced immediately by your authorized dealer. Four wheel drive high (RTT and 4x4 static) (if equipped): Displays HIGH when four-wheel drive high is engaged. If the light fails to display when the ignition is turned on, or remains on, have the system serviced immediately by your authorized dealer. Electronic locking differential (RTT and static) (if equipped): Displays when using the electronic locking differential. Speed control (if equipped): The speed control system indicator light changes color to indicate what mode the system is in: 19 2011 F-250/350/450/550 (f23) Owners Guide, 4th Printing USA (fus)