1997 Ford F250 Owner's Manual - Page 78

To Turn Speed Control Off u Press OFF OR u Turn off the vehicle ignition. Once speed control is switched off, the previously programmed set speed will be erased. To Turn Speed Control On u Press ON RWARNING Do not shift the transmission into N (Neutral) with the speed control on. To Set A Speed Press SET ACCEL. For speed control to operate, the speed control must be ON and the vehicle speed must be greater than 30 mph (48 km/h). If you drive up or down a steep hill, your vehicle speed may vary momentarily slower or faster than the set speed. This is normal. Speed control cannot reduce the vehicle speed if it increases above the set speed on a downhill. If your vehicle speed is faster than the set speed while driving on a downhill in Overdrive, you may want to shift to the next lower gear to reduce your vehicle speed. If your vehicle slows down more than 10 mph (16 km/h) below your set speed on an uphill, your speed control will disengage. This is normal. Pressing RES (Resume) will re-engage it. 77