FORD 2014 F-150 Raptor v.2 - Manual (Page 88)

Parking Brake On Warning Chime
Sounds when you have left the parking
brake on and drive your vehicle. If the
warning chime remains on after you have
released the parking brake, have the
system checked by your authorized dealer
immediately.
85
F150 (TF6) , enUSA
Instrument Cluster