Stereo removal I have a 1997 Ford Crown Victoria and was wondering if I needed to remove the entire dashboard to remove the tape deck?

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.

Use vinegar to unfreeze

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

Lap belt or shoulder harness? Lap belt - remove rear seat bottom by pushing in on bottom edge of the seat cushion and lifting. This will expose the lap belt and its anchor. Shoulder belt should be accessible via trunk compartment. If not then you'll have to remove the back of the rear seat to get to it.

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.

You don't.
The dash has to come out in order to remove the HVAC box to get to it.

yes it is safer to use a bal joint press . and it goes downward.

You dont need to remove all of those thing to do that. Working on the passenger side, remove the globe box and then the air bag, you are gonna see the bolts there. Now yo can see the black box behind the globe box? you have to remove the screws, some from the inside and some from the ouside (very hard to reach, under the box of the AC box outside).
Lifth the black box of the heater core and change it!!!

no more then 10 to 15 bolts they are under the hood remove the inner fender and you will see the rest and there should be one or two under the car near the doors

Remove the set screws from the housing and remove the light.