I guess that you have to change the sensor for the heat/ac. This job takes about 8 hours, lots of patience, and a small socket set and screw drivers. Remove the trim from the dash, just snaps out ( carefully ) then remove the glove box door, there you will see all the small screws that have to be removed. As you start from the passenger side and work to the drivers side you will see where all the screws have to be removed. You also have to drop the steering column, I believe 4 bolts.
take off the ground from the battery then put it back
you have to remove the clips on the dash and take out the lock ring around the lighterr
According to the 1996 Ford Crown Victoria owners manual : With engine oil filter change : ( 5.0 quarts / 4.7 liters of engine oil ) * the engine oil dipstick is used to determine the exact fill requirement *
blinking overdrive light indicates a transmission problem. take car to a transmission mechanic
MerconV
R134a
5-30
Follow the wires. Have to take off the covers first.
Should take 4.5 liters of oil.
On a 1989 Ford Crown Victoria : The gas tank size is ( 20 U.S. gallons ) according to my Chilton's repair manual
You'd have to use a spanner of some sort
Take the bulb out.