Safety Messages for Installers and Operators
5
Installation, Maintenance, and Service Manual
Federal Signal
www.fedsig.com
• 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.
• Make sure the siren amplifier 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 air bag sensors.
• Installation of two speakers requires wiring speakers in phase.
• Never attempt to install aftermarket equipment that 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 air bag deployment.
• Locate the control head so the vehicle, controls, and microphone can be operated
safely.
• When drilling into a vehicle structure, enure that both sides of the surface are clear
of anything that could be damaged.
