Reaching rear seat belt on 1997 crown victoria

In some large cars like yours you can remove the rear seat back and open a plate that gives access to the trunk. Depending on your car if it is just a small access panel you will have to go on a fishing expedition with a magnet attached to a rod of some sort to fish them out.

If you want to solve your problem, click on the link I attached
2003 Ford Crown Victoria Workshop Repair Service Manual PDF Download

reading forums on this reveals that the h9 is a 3.55 limited slip diff mainly used in f150 fords. However all that is immaterial as what you are looking for is a diff centre that is 3.55 ratio that will fit in your housing . The same housing will use the both LSD and normal diffs as the LSD was an option offered for off road vehicles or vehicles operating in bad road conditions

I had the same problem its either the light switch or a loose connection going to the switch I could reach up in the dash and wiggle the wires going to the light switch and mine would come on

the switch is shorted, if it moves in one direction but not the other, its the switch , since all the switch does is reverse the power supplied to it,, the up side of the switch is bad, replace it

Attempt to change all of the spark plug wiring and spark plugs. Then start the vehicle.

Sedans

1. Remove the screw(s) and wing nut retainers at the rear of the luggage compartment and push the trim away from the back of the light.
   
2. Remove the wing nuts retaining the light assembly to the vehicle and the retaining nut from either side of the luggage compartment and pull the light body assembly from the vehicle.
   
3. Turn the bulb socket(s) counterclockwise to the stop and remove the socket(s) from the light assembly. Remove the bulb(s) from the socket(s).
   
4. Installation is the reverse of the removal procedure.
   

Push the trim away from the back of the light—1992-98 Crown Victoria


The rear tailamp assembly is held by various fasteners


Remove the wing nuts retaining the light assembly to the lower back panel—1992-98 Crown Victoria


Remove the nut retaining the light assembly from the side of the luggage compartment


Pull the light assembly away from the vehicle—1992-98 Crown Victoria

the following links show how to remove the seats
How To Remove Rear Seat Crown Victoria Yahoo Video Search Results

There should be a safety trunk release located on the upper rear window deck platform- a black handpull . If it is still intact- it should pop the trunk lid.

must remove the assembly from the car, unbolts from the inside of the engine compartment.