Ford 2010 Crown Victoria Owner's Manual page 280

Crown Victoria Severe Duty
transceivers, garage door openers and other transmitters whose power
output is 5 watts or less will not ordinarily affect your vehicle's
operation.)
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.
Malfunction of aftermarket electronic equipment should be resolved by
the equipment manufacturer.
Aftermarket equipment installation
Ford has developed a Police Interceptor Modifier Guide to assist the
vehicle modifier in safely installing police equipment into the vehicle.
The guide provides detailed information on the location of key vehicle
components that must be untouched and warnings for other areas where
caution must be exercised. The Modifier Guide is available for
downloading, free of charge, from www.fleet.ford.com.
When installing aftermarket equipment, avoid using fasteners that are too
long for the application or are in an area which might damage vehicle
components, including wiring, brake lines, fuel tank and lines, powertrain
components, exhaust system and suspension.
Also, do not make electrical connections to vehicle electrical systems not
specifically designed for aftermarket equipment installations. Refer to the
"Wiring Diagram Manual" for electrical system information.
Do not install any components into the powertrain control module
(PCM) or PCM harness. Connecting into this system may affect engine
and transmission operation.
As an example: connection of aftermarket electrical equipment into the
brake light circuit or any other circuit which is connected to the PCM,
anti-lock brake computer, airbag system or any other vehicle system
which will cause vehicle malfunction.
WARNING: Contact during a crash with aftermarket equipment
in a vehicle can result in a personal injury.
WARNING: Installation of prisoner barriers may increase the
risk of injury to front seat occupants if the vehicle is impacted
from the rear at high speeds. This risk should be balanced, by the law
enforcement agency, against the risk of injury to the Officer associated
with prisoner transport.
280
2010 Crown Victoria (cro)
Owners Guide, 1st Printing
USA (fus)