1996 Ford Bronco Owner's Manual - Page 234

When turning, drive slightly beyond the normal turning point so the trailer wheels will clear curbs or other obstructions. When stopped in traffic for long periods of time in hot weather, place the gearshift selector lever in P (Park) to increase the engine idle speed. This aids in engine cooling and air conditioner efficiency. If the engine overheats, move the function selector knob to VENT to stop the compressor and increase the engine speed for a short time. Vehicles with trailers should not be parked on a grade. However, if you must park on a grade, place wheel chocks under the trailer's wheels as follows: u Apply the foot service brakes and hold. u Have another person place the wheel chocks under the trailer wheels. u With the chocks in place, release the foot u For automatic transmissions - apply the service brakes, making sure the chocks are holding. parking brake by pressing the service brake pedal down firmly with your right foot while applying the parking brake pedal with your left foot. For manual transmissions - apply the service brake and shift into N (NEUTRAL) while still maintaining pressure on the service brake pedal. Set the parking brake fully. 234