1997 Ford F250 Owner's Manual - Page 150

When the transfer case is in the N (Neutral) position, the engine and transmission are disconnected from the rest of the driveline. Therefore, the vehicle is free to roll even if the automatic transmission is in P (Park) or the manual transmission is in gear. RWARNING Do not leave the vehicle unattended with the transfer case in the N (Neutral) position. Always set the parking brake fully and turn off the ignition when leaving the vehicle. To release the parking brake, press the service brake pedal with your right foot and pull the parking brake release lever. RWARNING If the parking brake is fully released, but the Brake System light remains on, have the brakes checked immediately. They may not be working properly. The parking brake is not designed to stop a moving vehicle, but you can use the parking brake to stop your vehicle in an emergency if the normal brakes fail. However, since the parking brake applies only the rear brakes, the stopping distance will increase greatly and the handling of your vehicle will be adversely affected. 150