Ford 1996 Crown Victoria Manual page 312

Battery
Check and recharge as necessary.
Keep connections clean and covered with a
light coat of grease.
If storing your vehicle for more than 30 days
without recharging the battery, it may be
advisable to disconnect the battery cables to
ensure battery charge is maintained for quick
starting.
NOTE: If battery cables are disconnected, it
will be necessary to reset memory
features.
Brakes
Make sure brakes and parking brake are fully
released.
Tires
Maintain recommended air pressure.
Miscellaneous
Make sure all linkages, cables, levers and
clevis pins under vehicle are covered with
grease to prevent rust.
Move vehicles at least 25 feet (8 m) every 15
days to lubricate working parts and prevent
corrosion.
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