Ford 1996 Thunderbird Manual page 186

Connecting the trailer's brakes
Electric brakes and manual, automatic, or
surge-type hydraulic brakes are safe if you
install them properly and adjust them according
to the manufacturer's instructions. Be sure that
your trailer's brakes meet local and federal
regulations.
If your vehicle is equipped with the optional
trailer tow package, provisions have been made
under the instrument panel for installation of an
electronic brake controller.
Do not connect a trailer's hydraulic brake
system directly to your vehicle's brake
system. Your vehicle may not have
enough braking power and your chances
of having a collision greatly increase.
Connecting the trailer's lights
Do not connect a trailer's lighting system
wiring directly to your vehicle's lighting system
wiring. To get the proper equipment for
hooking up your trailer's lights, see your local
trailer dealer and your Ford dealer. Be sure to
follow their instructions carefully.
If your vehicle is equipped with the optional
trailer tow package, the proper lamp wiring and
equipment has been installed at the factory. The
trailer feed wire (supplied in a box in the
luggage compartment) needs a connector
compatible with your trailer prior to installation.
If you do not install trailer lights correctly, you
may cause damage to the vehicle's lighting
system.
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