Ford 1996 Taurus Manual page 136

NOTE: The operating range of the remote
entry system can also be affected by
weather conditions (such as very cold
temperatures) or structures around the
vehicle (buildings, other vehicles, radio
and TV towers, etc.). Typical operating
range will allow you to be up to 33
feet (10 meters) away from your
vehicle.
The transmitter can be snapped apart to replace
the batteries by twisting a thin coin between the
two halves of the transmitter. DO NOT TAKE
THE FRONT PART OF THE TRANSMITTER
APART. When installing the new batteries, be
sure to place the positive (+) side down as
marked. Snap the two halves back together.
Replacing the batteries
Replacing lost transmitters
In the event a transmitter is lost, you should
take all your vehicle's transmitters to your
dealer to have the remote entry system
deprogrammed for the lost transmitter. This is
necessary to prevent further unauthorized use of
the lost transmitter.
You can also purchase additional transmitters
(up to 4 transmitters can be used) from your
dealer. You will need to take all your
transmitters to the dealer so they can program
them to the remote entry system all at the same
time.
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