Federal Signal Corporation PA4000 Manual

Installation, Maintenance,
and Service Manual
255292
REV. D1 1220
Printed in U.S.A.
© Copyright 1994-2020 Federal Signal Corporation
PA4000 Electronic Siren

blank page
blank page
Limited Warranty
This product is subject to and covered by a limited warranty,
a copy of which can be found at www.fedsig.com/SSG-Warranty.
A copy of this limited warranty can also be obtained by written
request to Federal Signal Corporation, 2645 Federal Signal Drive,
University Park, IL 60484, email to [email protected] or
call [phone].
This limited warranty is in lieu of all other warranties, express or
implied, contractual or statutory, including, but not limited to the
warranty of merchantability, warranty of tness for a particular
purpose and any warranty against failure of its essential purpose.
2645 Federal Signal Drive
University Park, Illinois 60484-3167
www.fedsig.com
Customer Support
Police/Fire-EMS: 800-264-3578 • [phone]
Work Truck: 800-824-0254 • [phone]
Technical Support 800-433-9132 • [phone]
All product names or trademarks are properties of their respective owners.

3
Installation, Maintenance, and Service Manual
Federal Signal www.fedsig.com
Contents
Safety Messages for Installers and Operators ............................................................................. 4
Introduction...................................................................................................................................... 8
Installing the Amplier.................................................................................................................... 9
Installing the Control Head........................................................................................................... 10
Making the Electrical Connections.............................................................................................. 11
Connecting the Siren .................................................................................................................... 12
Finishing the Installation .............................................................................................................. 16
Testing the Installation.................................................................................................................. 16
Operating the Siren ....................................................................................................................... 16
Getting Technical Support and Service....................................................................................... 19
Figures
Figure 1 PA4000 wiring .................................................................................................................................... 13
Figure 2 PA 4000 control head...................................................................................................................... 17
Tables
Table 1 Specifications.........................................................................................................................................9
Table 2 Tap II Functions ................................................................................................................................. 17
Table 3 Tap II Functions................................................................................................................................... 18
Table 4 Replacement parts............................................................................................................................. 19

Safety Messages for Installers and Operators
4PA4000 Electronic Siren System
Federal Signal www.fedsig.com
-1-
Safety Messages for Installers and Operators
For your safety, read and understand this manual thoroughly before installing,
operating, and servicing the e-Q2B Siren Amplifier. The safety messages presented
in this section and throughout the manual are reminders to exercise extreme care at
all times. In addition, read and understand the safety instructions to installers (doc. no.
256A692), and keep it close at hand for reference.
To download copies of this manual, go to www.fedsig.com or call the Federal Signal
Service Department at 1-800-433-9132, 7 a.m. to 5 p.m., Monday through Friday (CT).
Safety Messages to Installers of Federal Signal Sound/Light Systems
People’s lives depend on your proper installation and servicing of Federal Signal
products. It is important to read and follow all instructions shipped with this product.
Listed below are some other important safety instructions and precautions you should
follow.
Before Installation
Qualifications
• To properly install an electronic siren, you must have a good understanding of
automotive electrical procedures and systems, along with proficiency in the
installation and service of safety warning equipment. Always refer to the vehicle’s
service manuals when performing equipment installations on a vehicle.
Sound Hazards
• Your hearing and the hearing of others, in or close to your emergency vehicle,
could be damaged by loud sounds. This can occur from short exposures to very
loud sounds, or from longer exposures to moderately loud sounds. For hearing
conservation guidance, refer to federal, state, or local recommendations. OSHA
Standard 1910.95 oers guidance on “Permissible Noise Exposure.”
• All eective sirens and horns produce loud sounds (120 dB) that may cause
permanent hearing loss. Always minimize your exposure to siren sound and wear
hearing protection. Do not sound the siren indoors or in enclosed areas where
you and others will be exposed to the sound.
• Federal Signal siren amplifiers and speakers are designed to work together as a
system. Combining a siren and speaker from dierent manufacturers may reduce
the warning eectiveness of the siren system and may damage the components.
You should verify or test your combination to make sure the system works
together properly and meets federal, state and local standards or guidelines.
During Installation
• Do NOT get metal shavings inside the product. Metal shavings in the product
can cause the system to fail. If drilling must be done near the unit, place an ESD-
approved cover over the unit to prevent metal shavings from entering the unit.
Inspect the unit after mounting to ensure that there are no shavings present in or
near the unit.

Safety Messages for Installers and Operators
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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 eectiveness 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
eectiveness 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 eective for warning others.
• Sound propagation and warning eectiveness 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 aect 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.

Safety Messages for Installers and Operators
6PA4000 Electronic Siren System
Federal Signal www.fedsig.com
After Installation
• After installation, test the emergency warning system to ensure that it is operating
properly.
• Test all vehicle functions, including horn operation, vehicle safety functions, and
vehicle light systems, to ensure proper operation. Ensure that installation has not
aected vehicle operation or changed any vehicle safety function or circuit.
• After testing is complete, provide a copy of these instructions to the instructional
sta and all operating personnel.
• File these instructions in a safe place and refer to them when maintaining or
reinstalling the product.
Failure to follow all safety precautions and instructions may result in property damage,
serious injury, or death.
RETAIN AND REFER TO THESE MESSAGES
Safety Messages to Operators of Federal Signal Sound/Light Systems
People’s lives depend on your safe operation of Federal Signal products. It is
important to read and follow all instructions shipped with the products. Listed below
are some other important safety instructions and precautions you should follow.
• Do not attempt to activate or deactivate the controls of the emergency warning
system while driving in a hazardous situation.
• Although your warning system is operating properly, it may not be completely
eective. People may not see, hear, or heed your warning signal. You must
recognize this fact and continue to drive cautiously.
• Situations may occur that obstruct your warning signal when natural and man-
made objects are between your vehicle and others, such as raising your hood or
trunk lid. If these situations occur, be especially careful.
• All eective sirens and horns produce loud sounds that may cause, in certain
situations, permanent hearing loss. You and your passengers should consider
taking appropriate safety precautions, such as wearing hearing protection.
• The eectiveness of an interior mounted warning light depends on the clarity, the
tinting, and the angle of the glass it is being placed behind. Tinting, dirt, defects,
and steeply angled glass reduce the light output of the warning light. This may
reduce the eectiveness of the light as a warning signal. If your vehicle has dirty,
tinted, or steeply angled glass, use extra caution when driving your vehicle or
blocking the right of way with your vehicle.
• In order to be an eective warning device, this product produces bright light that
can be hazardous to your eyesight when viewed at a close range. Do not stare
directly into this lighting product at a close range, or permanent damage to your
eyesight may occur.

Safety Messages for Installers and Operators
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• It is important that you fully understand how to safely operate this warning system
before use.
• Operate your vehicle and its light/sound system in accordance with your
department’s Standard Operating Procedures.
• If a selected function does not perform properly or if any of the lamps remain
illuminated when the control is o, disconnect the power connector from the
control unit and contact the nearest service center.
• At the start of your shift, ensure that the entire warning light system and the siren
system is securely attached and operating properly.
• Suction cup mounting is for temporary applications only. The unit should be
removed from the window and stored securely when not in use. Temperature
changes and sunlight can cause suction cups to lose holding power. Periodically
check the unit to be sure the suction cups have a firm grip on the mounting
surface. An improperly secured light could fall o of the vehicle causing injury and
damage.
• The holding power of magnetic mounting systems is dependent upon surface
finish, surface flatness, and thickness of the steel mounting surface. Therefore, to
promote proper magnetic mounting:
• Keep mounting surface and magnets clean, dry, and free of foreign particles
that prevent good surface contact.
• Ensure that mounting surface is flat.
• Do not use a magnet mounting system on vehicles with vinyl tops.
• To prevent sliding of light assembly on mounting surface, avoid quick
acceleration and hard stops.
Failure to follow these precautions may result in property damage, serious injury, or
death.

Introduction
8PA4000 Electronic Siren System
Federal Signal www.fedsig.com
Introduction
The Federal Model PA4000 is a precision built, ecient and economical full-featured
electronic siren of advanced design. It provides wail, yelp and priority siren tones,
as well as the Tap II feature, public address (PA), radio rebroadcast and an air horn
sound.
The siren may be installed in negative ground vehicles with 12-volt electrical systems.
It is protected against failure modes (including reversed polarity) by a fuse that is
replaceable without tools. No components protrude from the bottom of the siren to
interfere with mounting arrangements.
The siren is made up of an Amplifier and a Control Head. The Amplifier is suitable for
mounting in a dry, adequately ventilated location, while the Control Head is designed
for flush mounting in the vehicle interior. Communication between the two units is via
an RJ45 telephone connector.
A noise cancelling microphone is wired in to prevent loss or theft. It provides high
quality voice reproduction without feedback (squeal). The microphone push-to-talk
switch overrides any siren signal for instant PA use. PA and radio volume are preset at
the factory for maximum gain.
The Model PA4000 is designed to drive one or two 100-watt speakers. Using two
100-watt speakers will provide maximum trac clearing power.
The Tap II feature allows the driver to change the siren sound via the vehicle’s horn
ring or any remotely mounted switch.
A horn ring switch allows the driver to determine the function of the horn ring. LEDs
indicate when the vehicle horn is disabled and the horn ring is controlling either Tap II
or the air horn tone.
Other special features of the Model PA4000 include:
• High degree of reliability is achieved through the use of a CMOS microprocessor
and silicon output transistors.
• Control panel is illuminated with non-glare lighting.
• Newly designed printed circuit board provides improved performance and
durability under a wide range of environmental conditions.
• AUX/OUT can drive an external relay for controlling other devices, such as
warning lights.
• AUX/IN input can activate wail when the siren selector is in the manual position.
• Park-Siren Deactivator can deactivate siren tones when the vehicle is shifted into
PARK.
• A diagnostic capability for speaker testing uses two LEDs for visual indication and
four test tones for audible indication.

Installing the Amplier
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Installation, Maintenance, and Service Manual
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Table 1 Specications
Input Voltage 11 Vdc to 16 Vdc
Polarity Negative ground electrical systems only
Standby Current 250 mA (backlighting extinguished)
Operating Current
(Control Head & Ampl.)
13 A ±1 A (at 13.6V with 5.5-ohm load)
Frequency Range 725 to 1600 Hz (nominal)
Cycle Rate Wail- 14 cycles/min. Yelp- 180 cycles/min.
Voltage Output (approx.) 62 VP-P
Audio Frequency Range 300 to 3 KHz
Harmonic Audio Distortion
(300-3000Hz)
10% max. all power levels from 1/2 to 50 watts (frequency
response ±3 dB)
Operating Temperature Range -30°C to +65°C (-22°F to +149°F)
Control Head Dimensions
(H x W x D)
2.9 x 6.3 x 1.5 inches (7.37 x 16.00 x 3.81 cm)
Amplier Module Dimensions
(H x W x D)
3.9 x 6.9 x 4.8 inches (9.91 x 17.53 x 12.19 cm)
Shipping Weight (approx.) 7 pounds (0.45 kg)
Kit Contents
After unpacking the kit, examine it for damage that may have occurred in transit. If the
product has been damaged, file a claim immediately with the carrier stating the extent
of damage. Carefully check all envelopes, shipping labels, and tags before removing
or destroying them. Ensure all parts in the packing list are included in the shipment. If
any parts are missing, call Federal Signal Customer Support at 1-800-264-3578, 7a.m.
to 5 p.m., Monday through Friday, CT.
Installing the Amplier
UNIT REQUIRES AIR FLOW: The siren amplier is cooled by an internal fan.
Do not install it in areas where the air ow is restricted. Do not mount the unit
near a heater duct or under the hood.
UNIT IS NOT WATERPROOF: The siren amplier is NOT waterproof. The
module must be mounted in a location that is sheltered from falling rain, snow,
standing water, etc.
To install the amplifier:
1. Select a suitable mounting location for the amplifier. Some possible mounting
locations are in the equipment cabinet, under the front seat, or in the trunk (under
the rear deck, near the rear seat speakers if the vehicle is so equipped). Keep in
mind that the control cable is 15 feet long.

Installing the Control Head
10 PA4000 Electronic Siren System
Federal Signal www.fedsig.com
2. Using the mounting holes on the amplifier as a template, scribe four drill position
marks at the mounting location.
DRILLING PRECAUTIONS: Before drilling holes, check the area into which
you plan to drill to ensure that you do not damage vehicle components. All
drilled holes should be deburred and all sharp edges should be smoothed.
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.
3. The mounting hardware supplied in the siren accessory kit gives you a choice of
mounting hardware: thread-forming screws with lockwashers or 1/4-20 cap screws
with lockwashers and hex nuts. Consequently, the holes drilled in the mounting
surface must be appropriate for the mounting screws selected. If the thread-
forming screws are to be used, drill 3/16-inch holes at the drill position marks.
Drill 9/32-inch holes at the position marks if you are using the 1/4-20 cap screws,
lockwashers and nuts.
4. Secure the amplifier to the mounting surface using the mounting hardware,
including lockwashers.
Installing the Control Head
AIRBAG DEPLOYMENT: Do not install equipment or route wiring in the
deployment path of an airbag. Failure to observe this warning will reduce the
eectiveness of the airbag or potentially dislodge the equipment, causing
serious injury or death.
SEAT REMOVAL PRECAUTION: If a vehicle seat is temporarily removed, verify
with the vehicle manufacturer if the seat needs to be recalibrated for proper
airbag deployment. Failure to follow this warning cause serious injury or
death.
The control head is designed to be flush mounted in any relatively flat surface.
To install the control head:
1. Select a location for the control head on the mounting surface that does not impair
drivers’ ability to safely drive the vehicle as they operate the siren. The selected
location should aord good visibility and free accessibility to the Control Head
controls.
2. Place the mounting template, supplied in the accessory kit, over the selected
mounting location. Scribe a mark for each of the four mounting holes. Also scribe
a cut mark along the heavy, dark line on the template.

Making the Electrical Connections
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Installation, Maintenance, and Service Manual
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DRILLING PRECAUTIONS: Before drilling holes, check the area into which you
plan to drill to ensure that you do not damage vehicle components. All drilled
holes should be deburred and all sharp edges should be smoothed.
3. Drill four 0.12-inch diameter (#31 drill) mounting holes at the marks scribed in
step2.
4. Using a keyhole saw or sabre saw, saw into the mounting surface at the cut mark
scribed in step 2.
NOTE: Before completing the Control Head installation, perform the procedures in the
Making the Electrical Connections section.
5. With all wiring connections complete, place the Control Head in position and
secure to mounting surface with four (4) #6B Phillips head thread-forming screws
(supplied).
Making the Electrical Connections
AIRBAG DEPLOYMENT: Do not install equipment or route wiring in the
deployment path of an airbag. Failure to observe this warning will reduce the
eectiveness of the airbag or potentially dislodge the equipment, causing
serious injury or death.
SEAT REMOVAL PRECAUTION: If a vehicle seat is temporarily removed, verify
with the vehicle manufacturer if the seat needs to be recalibrated for proper
airbag deployment. Failure to follow this warning cause serious injury or
death.
Control Cable
The control cable is designed to be installed between the amplifier and the control
head. It consists of an eight-conductor cable terminated on both ends with RJ45
connectors.
To install the control cable:
1. Install the one end of the control cable to the mating connector on the control
head.
2. Route the control cable toward the Amplifier.

Connecting the Siren
12 PA4000 Electronic Siren System
Federal Signal www.fedsig.com
DRILLING PRECAUTIONS: Before drilling holes, check the area into which
you plan to drill to ensure that you do not damage vehicle components. All
drilled holes should be deburred and all sharp edges should be smoothed.
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.
3. If routing the cable requires drilling a hole in sheet metal or other material, drill a
5/8-inch hole in the material. Install a 5/8-inch grommet (not supplied) or similar
protective device in the hole to protect the cable from damage sharp edges could
cause.
4. Install the other end of the control cable to the mating connector on the amplifier.
Connecting the Siren
The unit is supplied with an eleven-position connector to perform the electrical
installation. User-supplied, 14-gauge red and black wires are required for the positive
(+) and ground (-) connections. User-supplied, 18-gauge wires are required for the
speaker, radio, horn switch, park switch, backlighting, and case ground connections.
To install a wire in the eleven-position connector, strip 1/4 inch of insulation from the
end of the wire. Then insert the wire into the connector and tighten the screw at the
appropriate connector position.
Speaker
The unit is designed to operate with one 11-ohm impedance speaker (100 W) or two
11-ohm impedance speakers (100 W).
When using one 100 W speaker, use 18-gauge wire and connect the speaker leads to
positions 1 and 2 of the eleven-position connector as shown in Figure 1.
DO NOT WIRE IN PHASE: Improper diagnostic test indications will result
if speakers are connected in parallel.
When using two 100 W speakers, they must be connected in phase. See Figure1.
On Federal Signal speakers, this can be accomplished (using 18 gauge wire) by
connecting the two speaker leads marked “2” to position 1 of the eleven-position
connector. Connect one of the speaker leads marked “1” to position 2 of the eleven-
position connector. Connect the other speaker lead marked “1” to position 3 of the
eleven position connector.

Connecting the Siren
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Installation, Maintenance, and Service Manual
Federal Signal www.fedsig.com
Figure 1 PA4000 wiring
290A2697B
FUSIBLE
LINK
TWO (2)
1/4" INSULATED
FEMALE TERMINALS
WIRE
STRIPPING
TYPICAL
11 PIN
CONNECTOR
CONTROL CABLE
CONTROL HEAD
BATTERY
POS. AND NEG.
14 GA.
18 GA.
(10)
1/4"
*
**
**
CONTROL
BATTERY
POS
IGN CHASSIS AUX OUT PARK 200mA
MAX.
AUX IN SPKR 1
SPKR 2 RADIO SPKR COM
NEG
FUSE
20
2 3 4 5 6 7 8 9 10 111
BATTERY
COMMON
GROUND
+
+
+
+
-
LAMP HORN
HORN RING
CUT WIRE
WHT/YEL
BLK
RED
WHT
4 3 2 1
RELAY
IGNITION SWITCH
DASH LIGHT OR IGNITION SWITCH
PUSH ON
PUSH OFF
SW
MOMENTARY SW.
VEHICLE SUPPLIED
PARK/NEUTRAL
12VDC
OR
GROUND
**
*
12VDC
OR
GROUND
12VDC
PA
PA4000
RADIO
UNIVERSITY PARK, IL. U.S.A.
SPEAKER
NO. 1
1
2
SPEAKER
NO. 2
2 WAY
RADIO
SPEAKER
INPUT
2
1
END VIEW OF
CONTROL HEAD
SHOWN HERE
Radio
To allow incoming radio messages to be rebroadcast over the outside speakers,
connect user-supplied, 18-gauge wires to positions 4 and 5 of the eleven-position
connector. Connect the other end of the 18 gauge wires across the two-way radio’s
speaker. See Figure 1.
Aux In
This input will activate the wail siren tone when the siren selector is in manual.
To use this feature, connect a user-supplied, 18-gauge wire to position 6 of the
eleven-position connector as shown in Figure 1.
Park-Siren Deactivator
IMPORTANT: It is the installer’s responsibility to determine an appropriate location in
the vehicle circuitry to connect this wire.
This feature automatically deactivates siren tones when the vehicle is shifted into
Park.

Connecting the Siren
14 PA4000 Electronic Siren System
Federal Signal www.fedsig.com
To use this feature, connect a user-supplied, 18-gauge wire to position 7 of the eleven-
position connector. Connect the other end of the wire to a vehicle circuit that is,
depending on the vehicle, grounded or connected to battery positive (+) when the
vehicle is shifted into Park. See Figure 1 on page 13.
Aux Out
NOTE: This output is activated any time the siren is operating in Wail, Yelp, or Priority
mode.
This feature can be used to activate an external relay (200 mA maximum) for
controlling warning lights.
To use this feature, connect a user-supplied, 18-gauge wire to position 8 of the
eleven-position connector as shown in Figure 1 on page 13.
Ground
Connect a user-supplied, 18-gauge black wire to position 9 of the eleven-position
connector. Connect the other end of the wire to the negative battery terminal.
Ignition
Connect a user-supplied, 18-gauge wire to position 11 of the eleven-position
connector. Connect the other end of the wire to a vehicle circuit that is powered when
the ignition switch is “on.”
Horn Ring Cable
The horn ring cable assembly, located in the accessory kit, is a four-wire cable
terminating in an orange edge connector. This connector should be installed on the
mating four-pin connector (J2) located on the Control Head PC board, and should
be oriented so that the white wire is closest to the RJ45 phone jack. The following
paragraphs describe the installation of the leads at the other end of the horn ring
cable.
Horn Ring
The horn ring transfer circuit of the siren is capable of switching a maximum
of 10 amperes.
NOTE: An external relay is not required for horn ring operation.
If the horn ring will not be used to control siren operation, fold back and insulate the
white and white/yellow wires in the power cable and disregard the procedure in this
paragraph. However, in order to utilize the Tap II and horn ring controlled Air Horn
features of the siren, the following procedure must be performed.
1. Locate the wire that connects the vehicle horn ring switch to the horn or horn
relay. Cut this wire.

Connecting the Siren
15
Installation, Maintenance, and Service Manual
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2. Splice the white/yellow wire in the horn ring cable to the horn ring side of the wire
that was cut in step 1. Insulate the splice with a wire nut (supplied).
3. Splice the white wire in the horn ring cable to the horn side of the cut wire.
Insulate the splice with a wire nut (supplied).
To connect the lamp:
1. Connect the red wire to the dash lights circuit or to a vehicle circuit that is
powered when the ignition switch is “on.” This connection will supply power to the
Control Head panel lights whenever the headlights are “on” or the vehicle ignition
key switch is in the “on” position.
2. Connect the black wire to the negative battery terminal.
The Control Head can now be secured to the vehicle dashboard.
Amplier Power Connections
When making the power connections to the PA4000, each wire must be terminated
with an appropriate 1/4-inch female, insulated, quick-connect terminal. Complete the
wiring to the unit as follows:
1. Crimp the 1/4-inch female terminals on one end of user-supplied, 14-gauge red
and black wires. See Figure 1 on page 13. Connect the red wire to the “POS”
Amplifier connection. Connect the black wire to the “NEG” Amplifier connection.
DRILLING PRECAUTIONS: Before drilling holes, check the area into which
you plan to drill to ensure that you do not damage vehicle components. All
drilled holes should be deburred and all sharp edges should be smoothed.
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.
2. If the amplifier is installed in the vehicle passenger compartment, drill a 5/8-inch
hole in the vehicle firewall for the power and ground leads.
3. If necessary, drill a 5/8-inch hole in the vehicle firewall. Install a user-supplied
5/8-inch grommet, or similar device or material, to protect the wiring and cabling
against damage from rough edges.
4. Route the leads from the amplifier to an area near the battery. (Do not connect to
the battery at this time. If necessary, pass the lead through the 5/8-inch hole that
was drilled in step 2.
5. Connect the black wire to the negative battery terminal. A secure mechanical and
electrical connection is required.

Finishing the Installation
16 PA4000 Electronic Siren System
Federal Signal www.fedsig.com
Finishing the Installation
To finish the installation:
1. Plug the eleven-position connector into the mating connector on the unit, and
apply pressure until it locks into place.
FIRE HAZARD: If shorted to the vehicle frame, high current conductors can
cause hazardous sparks, resulting in electrical res or molten metal. DO
NOT connect this system to the vehicle battery until ALL other electrical
connections are made and mounting of all components is complete. Verify that
no short circuits exist before connecting to the positive (+) battery terminal.
Failure to follow this warning can cause a re and may result in serious injury
or death to you or others.
2. Connect the red (+) wire to the positive (+) terminal of the power source. A secure
mechanical and electrical connection is required.
Testing the Installation
SOUND HAZARD: All eective sirens and horns produce loud sounds (120 dB)
that may cause permanent hearing loss. Always minimize your exposure to
siren sound and wear hearing protection. Do not sound the siren indoors or in
enclosed areas where you and others will be exposed to the sound.
After installation, test the electronic siren, including horn operation, to ensure that it is
operating properly.
After testing is complete, provide a copy of this manual to all operating personnel.
Operating the Siren
All controls utilized during normal operation of the Model PA4000 are located on the
Control Head. See Figure 2.
Figure 2 PA 4000 control head
MAN
RAD
SPKR TEST
FEDERAL SIGNAL CORPORATION
WAIL
PRTY
YELP
290A2925
L R
A/HSIREN
HORN RING
AIR HORN
MANUAL

Operating the Siren
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Selector Switch
The Selector switch is a five-position rotary switch used to select the mode of
operation. The following are positions on the Selector switch.
• Radio: In this position, incoming radio messages are amplified by the siren and
rebroadcast over the outside speaker.
• Man: In this position, it is possible to operate the siren by activating the AIR HORN/
MANUAL paddle switch. The siren can also be activated by means of an auxiliary
switch, such as the horn ring button (refer to paragraph 4-6).
• Wail: In this position, the siren produces a continuous “wailing” sound up and
down in frequency.
• Yelp: In this position, a continuous rapid “warbled” tone is generated.
• Priority: In this position, a continuous extremely rapid “warbled” tone is generated.
NOTE: Pressing the microphone push-to-talk switch will override any function and
provide instant public address operation.
Horn Ring Switch
The horn ring switch determines the function of the vehicle horn ring.
1. In the center position, the vehicle’s horn will sound. Both red LEDs are
extinguished.
2. In the left (Siren) position, the red LED on the left is illuminated. Pressing the
vehicle’s horn ring activates the Tap II function and changes the audible siren
sound. The vehicle horn will not sound.
3. In the right (A/H) position, the red LED on the right is illuminated. Pressing the
vehicle’s horn ring sounds the air horn tone. The vehicle horn does not sound.
Air Horn/Manual Siren Switch
The Air Horn/Manual switch activates the electronic air horn sound (up) in any
selected position except Radio, and the peak-and-hold sound (down) in the Manual
position.
Tap II Functions
Tap II allows the driver to change the audible siren sound via the vehicle’s horn ring.
This feature is especially eective for clearing trac. The chart below demonstrates
how the horn ring can be used to change the siren sound.
Table 2 Tap II Functions
Selector First Horn Second Horn
Switch Ring Tap Ring Tap
Position Produces Produces
Wail Yelp Wail
Yelp Priority Yelp

Operating the Siren
18 PA4000 Electronic Siren System
Federal Signal www.fedsig.com
Press-and-Hold Function
NOTE: For the press and hold functions to operate with the horn ring, the Control
Head horn ring switch must be in the Siren position.
Additional alternate sounds can be activated when the Selector switch is set to
Manual or Priority. While pressing and holding the horn ring and the Selector switch
set to Manual, the peak-and-hold siren sounds. In the Priority position, the air horn
sounds. Releasing the horn ring causes the siren to revert back to the original
function.
The Tap II functions can also be activated by pressing the Manual Siren switch.
Table 3 Tap II Functions
First Tap Second Tap
Selector (Manual) (Manual)
Wail Yelp Wail
Yelp Priority (Hi-Lo) Yelp
Priority Air Horn Air Horn
NOTE: Peak-and-hold siren and air horn are the “Press and Hold” features.
Aux in Function
If installed, set the selector to switch to the Manual position. Activate the installed
auxiliary switch to sound the wail tone. To deactivate the wail tone, move the selector
switch to the Wail position and back to the Manual position.
Aux out Function
If installed, this function activates warning lights any time wail, yelp, or priority is
sounding.
Speaker Diagnostic Test
To test the speakers, set the selector switch to Radio. Press theAir Horn/Manual
paddle switch down. Four rapid beeps sound and the yellow LEDs flash four times.
Note that the yellow LEDs illuminate when a siren tone is sounding.
Park-Siren Deactivator
If installed, shifting the vehicle into Park silences the siren tones. Move the shift lever
to another position to sound the siren tone.
PA and Radio Gain Adjustment
The PA4000 comes from the factory with the PA and Radio Gain set to maximum.
To decrease the gain settings, proceed as follows while referring to Figure 1 on
page13.
1. Locate the PA and radio potentiometers on the logic PC board near the RJ45 jack.
2. Using a small flat blade screwdriver, rotate the appropriate potentiometer to the
desired volume setting.

Operating the Siren
19
Installation, Maintenance, and Service Manual
Federal Signal www.fedsig.com

Getting Technical Support and Service
20 PA4000 Electronic Siren System
Federal Signal www.fedsig.com
Ordering Replacement Parts
To order replacement parts, call Customer Support at 1-800-264-3578, 7 a.m. to
5p.m., Monday through Friday (CT) or contact your nearest distributor.
Table 4 Replacement parts
Reference
Designation
Description Part Number
Q106, Q109 Transistor, TIP35C, NPN, Power 125B437B
F1 Fuse, 20A, 32V 148A142A
LP1, 2 Lamp, Panel 149A120
Insulator (Q106, Q109) 235A150A
Amplier Power Circuit Board, PA4000
(with parts installed)
2001191A-01
Amplier Power Circuit Board, PA4000NY
(with parts installed)
2005002A-02
Amplier Logic Circuit Board
(with parts installed)
2005001B
Control Head Circuit Board
(with parts installed)
2001190A
Chassis 85361107A
Cover 85361103A
Amplier Assembly, PA4000 85361108A
Amplier Assembly, PA4000NY 85361108A-02
Control Assembly 85361106A
Accessory Kit 85361109A
Microphone 258B577A-02
Output Transformer 120258A
Getting Technical Support and Service
For technical support and service, please contact:
Service Department
Federal Signal Corporation
Phone: [phone]
Email: [email protected]
www.fedsig.com