Ford Thunderbird Owner's Manual page 268

NOTE: Mobile communications systems may
harm the operation of your vehicle,
particularly if they are not properly
designed for automotive use or are not
properly installed. For example, when
operated, such systems may cause the
engine to stumble or stall. In addition,
such systems may themselves be
damaged or their operation affected by
operating your vehicle. (Citizens band
[CB] transceivers, garage door openers,
and other transmitters whose power
output is 5 watts or less will not
ordinarily affect your vehicle's
operation.)
NOTE: Because we have no control over the
installation, design, or manufacture of
such systems, Ford cannot assume
responsibility for any adverse effects or
damage that may result if you use this
equipment.
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