5
Installation and Maintenance Manual
Federal Signal
www.fedsig.com
Safety Messages for Installers and Operators
• Do NOT connect this system to the vehicle battery until ALL other electrical
connections are made, mounting of all components is complete, and you have verified
that no shorts exist. If wiring is shorted to vehicle frame, high current conductors can
cause hazardous sparks, resulting in electrical fires or flying molten metal.
• Ensure that the siren amplifier/relay module and speaker(s) in your installation have
compatible wattage ratings.
• In order for the electronic siren to function properly, the ground connection must be
made to the NEGATIVE battery terminal.
• Sound output will be severely reduced if any objects are in front of the speaker. If
maximum sound output is required for your application, ensure that the front of the
speaker is clear of any obstructions.
• Install the speaker(s) as far forward on the vehicle as possible, in a location that
provides maximum signaling effectiveness and minimizes the sound reaching the
vehicle’s occupants. Refer to the National Institute of Justice guide 500-00 for further
information.
• Mounting the speakers behind the grille will reduce the sound output and warning
effectiveness of the siren system. Before mounting speakers behind the grille, make
sure the vehicle operators are trained and understand that this type of installation is
less effective for warning others.
• Sound propagation and warning effectiveness will be severely reduced if the speaker
is not facing forward. Carefully follow the installation instructions and always install the
speaker with the projector facing forward.
• Do NOT install the speaker(s) or route the speaker wires where they may interfere
with the operation of airbag sensors.
• Installation of two speakers requires wiring speakers in phase.
• Never attempt to install aftermarket equipment, which connects to the vehicle wiring,
without reviewing a vehicle wiring diagram available from the vehicle manufacturer.
Ensure that your installation will not affect vehicle operation and safety functions or
circuits. Always check vehicle for proper operation after installation.
• Do NOT install equipment or route wiring or cord in the deployment path of an airbag.
• If a vehicle seat is temporarily removed, verify with the vehicle manufacturer if the
seat needs to be recalibrated for proper airbag deployment.
• Locate the control head so the vehicle, controls, and microphone can be operated
safely.
• When drilling into a vehicle structure, ensure that both sides of the surface are clear
of anything that could be damaged. All drilled holes should be deburred and all sharp
edges should be smoothed. All wires going through drilled holes should be protected
by a grommet or convolute/split-loom tubing. Additionally, all exterior drilled holes
must be sealed with Motorcraft seam sealer T-A-2-B or equivalent to prevent the
potential exposure to carbon monoxide or other potentially harmful fumes. Failure to
observe this warning could cause serious injury or death.
