1996 Ford Crown Victoria Owner's Manual - Page 209

Tie down the load so that it does not shift and change the weight on the hitch. This will prevent damage to your vehicle and make your vehicle easier to handle. Hook-Up and Adjustment Procedure - Load Equalizing Hitch (option available in Canada only) Your vehicle is equipped with a rear air suspension system. When hooking up a trailer using a load equalizing hitch, always use the following procedure: 1. Place the unloaded vehicle on a level surface. With the ignition on and all doors closed, allow the vehicle to level automatically (approximately one to two minutes). Turn the air suspension switch on the right side of the trunk to OFF. Measure the height of a reference point on the front and rear bumpers at the center of the vehicle. Attach trailer to vehicle and adjust the hitch equalizer(s) so that the front bumper height is 0 to 1/2 inch below the unloaded height. After adjustment, the rear bumper should be no higher than in step 3. Turn the air suspension switch ON. RWARNING Adjusting an equalizing hitch so the rear bumper of the vehicle is lower or higher than it was unloaded will defeat the function of the load equalizing hitch and may cause unpredictable handling. 193 2. 3. 4. 5.