Federal Signal Corporation Allegiant ALGT61 Manual

25500773
Rev A1 0522
Printed in U.S.A.
© Copyright 2022 Federal Signal Corporation
Installation, Maintenance,
and Service Manual
Allegiant®Discrete Tow Light Bar

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.

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Installation, Maintenance, and Service Manual
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Contents
Safety Messages.............................................................................................................................. 5
Safety Message to Installers and Service Personnel of Warning Lights ...........................................5
Safety Messages to Operators of Federal Signal Sound/Light Systems ..........................................8
Overview......................................................................................................................................... 10
LED Lights, Colors, and Flash Patterns....................................................................................................10
Electrical System............................................................................................................................................10
Controller Option ...........................................................................................................................................10
Product Specifications.................................................................................................................................. 10
Setting the Light Bar Flash Pattern ............................................................................................. 12
Setting the Light Bar Flash Pattern ........................................................................................................... 12
Discrete Bars............................................................................................................................................. 12
Making the Electrical Connections...................................................................................................... 12
Setting the Light Bar Flash Pattern ........................................................................................................... 12
Wiring the Allegiant Light Bar ...................................................................................................... 15
Planning the Electrical Installation............................................................................................................. 15
Wiring the Stop/Turn/Tail Lights ........................................................................................................... 16
Connecting Power to the Light Bar .......................................................................................................... 17
Maintaining and Servicing the Allegiant ..................................................................................... 20
Servicing the Light Bar Domes..................................................................................................................20
Cleaning the Light Bar Lens or Dome ...............................................................................................20
Removing and Reinstalling the Light Bar Dome ............................................................................. 21
Replacing a PCB......................................................................................................................................22
Resetting the Controller ........................................................................................................................ 23
Troubleshooting the Light Bar................................................................................................................... 25
Getting Technical Support and Service....................................................................................... 26
Getting Repair Service.................................................................................................................................26
Ordering Replacement Parts ..................................................................................................................... 27

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Figures
Figure 1 Light Bar Positions .............................................................................................................................. 11
Figure 2 Stop/turn/tail wiring between light bar and vehicle harness................................................. 17
Figure 3 Power and cable connections ....................................................................................................... 18
Figure 4 Weathertight power and cable connections.............................................................................. 19
Figure 5 Four barrel nuts in passenger-side end dome.......................................................................... 21
Figure 6 Locations of ROC PCBs..................................................................................................................22
Figure 7 ROC Connections............................................................................................................................. 22
Tables
Table 1 Dimensions ........................................................................................................................................... 10
Table 2 Light Specifications ............................................................................................................................ 11
Table 3 Electrical and Temperature............................................................................................................... 11
Table 4 Allegiant®Flash Patterns ...................................................................................................................13
Table 5 Allegiant Discrete Mode 2 Flash Patterns....................................................................................14
Table 6 Wire functions and fuse requirements ..........................................................................................17
Table 7 Allegiant Discrete with Preterminated Weathertight Connectors ..........................................17
Table 8 Troubleshooting tips......................................................................................................................... 25
Table 9 Replacement parts.............................................................................................................................27

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Installation, Maintenance, and Service Manual
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Safety Messages
Safety Messages
For your safety, read and understand this manual thoroughly before installing,
operating, and servicing the Allegiant®light bar. The safety messages presented in
this chapter and throughout the manual are reminders to exercise extreme care at
all times. Read and understand the safety instructions and keep this manual close
at hand for reference. To download copies of this manual, go to
www.fedsig.com/resource-library or call the Federal Signal Service Department at
1-800-433-9132, 7  to 5 , Monday through Friday (CT).
Safety Message to Installers and Service Personnel of Warning Lights
Before Installation or Service
Qualifications
• To properly install or service this equipment, you must have a good understanding
of automotive mechanical and electrical procedures and systems, along with
proficiency in the installation and servicing of safety warning equipment. Always
refer to the vehicle’s service manuals when performing equipment installations on
a vehicle.
Light Hazards
• 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.
• Do not install the light system in an area that would block, impair, or blind the
driver’s vision. Ensure that the light system is mounted in a position that is outside
the driver’s field of vision so the driver can maintain safe vehicle operation.
• Federal Signal power supplies and light heads are designed to work together as
a system. Combining light heads and a power supply from dierent manufacturers
may reduce the warning eectiveness of the lighting system and may damage
the components. Verify or test your combination to make sure the system works
together and meets federal, state, and local standards or guidelines.
Electrical Hazards
• A light system is a high current system. In order for the system to function
properly, a separate negative (-) connection and positive (+) connection must be
made. All negative connections should be connected to the negative battery
terminal, and a suitable fuse should be installed on the positive battery terminal
connection as close to the battery as possible. Ensure that all wires and fuses are
rated correctly to handle the device and system amperage requirements.
• 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
or mandated safety functions or circuits. Always check the vehicle for proper
operation after installation.

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Safety Messages
• The lighting system components, especially light bulbs, strobe tubes, LEDs, and
the outer housing, get hot during operation. Be sure to disconnect power to the
system and allow the system to cool down before handling any components of the
system.
• DO NOT mount a radio antenna within 18 inches of the lighting system. Placing
the antenna too close to the lighting system could cause the lighting system to
malfunction or be damaged by strong radio fields. Mounting the antenna too close
to the lighting system may also cause the radio noise emitted from the lighting
system to interfere with the reception of the radio transmitter and reduce radio
reception.
• DO NOT attempt to wash this or any other electrical device while it is connected
to its power source. Exposure to liquid while the product is connected to the
power source may result in an electrical shock and personal injury and may short
circuit and damage the product.
During Installation and Service
• 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. Inspect the unit after mounting to ensure that there
are no shavings in or near the unit.
• To avoid a battery explosion, always disconnect the negative battery cable first
and reconnect it last. Avoid causing a spark when connecting near or to the
battery. The gases produced by a battery can cause a battery explosion that could
result in vehicle damage and serious injury.
• 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 the wiring is shorted to the vehicle body or frame,
high current conductors can cause hazardous sparks, resulting in electrical fires or
flying molten metal.
• DO NOT install equipment or route wiring (or the plug-in 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.
• Before mounting any components, check the manual to verify that the
component you are installing is suitable for use in that area of the vehicle. Many
components are not suitable for use in the engine compartment or other extreme
environmental exposure areas.
• When drilling into a vehicle, 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. 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.
• Because vehicle roof construction and driving conditions vary, do not drive a
vehicle with a magnetically mounted warning light installed. The light could fly
o the vehicle, causing injury or damage. Repair of damage incurred because of
ignoring this warning shall be the sole responsibility of the user.

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Installation, Maintenance, and Service Manual
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Safety Messages
• To avoid denting the roof of the vehicle, place the light bar mounting feet as close
to the outer edge of the roof as possible.
• Roof damage can occur if the hook adjustment bolts are overtightened. Torque
the adjustment bolts from 6 ft-lb to 7 ft-lb. Install keeper plates.
• Locate the light system controls so the VEHICLE and CONTROLS can be operated
safely under all driving conditions.
After Installation or Service
• After installation, test the light system to ensure that it is operating properly.
• If a seat is temporarily removed, verify with the vehicle manufacturer if the seat
needs to be recalibrated for proper airbag deployment.
• Test all vehicle functions, including horn operation, vehicle safety functions, and
vehicle light systems, to ensure proper operation. Ensure that the installation
has not aected the vehicle operation or changed any vehicle safety function or
circuit.
• Scratched or dull reflectors, mirrors, or lenses will reduce the eectiveness of
the lighting system. Avoid heavy pressure and use of caustic or petroleum-based
products when cleaning the lighting system. Replace any optical components that
may have been scratched or crazed during system installation.
• Do not attempt to activate or deactivate the light system control while driving in a
hazardous situation.
• Frequently inspect the light system to ensure that it is operating properly and that
it is securely attached to the vehicle.
• After installation and testing are complete, provide a copy of these instructions to
instructional sta and all operating personnel.
• Do not use a pressure washer to clean the light bar. Failure to heed this notice will
damage the light bar.
• File these instructions in a safe place and refer to them when maintaining and/or
reinstalling the product.
Failure to follow all safety precautions and instructions may result in property damage,
serious injury, or death.

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Safety 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 light system control while driving in a
hazardous situation.
• Although your warning system is operating properly, it may not be completely
eective. People may not see 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
manmade 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.
• 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.
• It is important that you fully understand how to safely operate this warning system
before use.
• Operate your vehicle and the 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 are securely attached and operating properly.
• Suction cup mounting is for temporary applications only. Window-mounted
warning lights 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 ensure that 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.

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Safety Messages
• 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 the mounting surface and the magnets clean, dry, and free of foreign
particles that prevent good surface contact.
• Ensure that the mounting surface is flat.
• Do not use a magnetic mounting system on vehicles with vinyl tops.
• To prevent sliding of the light assembly on the mounting surface, avoid quick
acceleration and hard stops.
Failure to follow all safety precautions and instructions may result in property damage,
serious injury, or death.

1010 Allegiant®Tow Discrete Light Bar
Federal Signal www.fedsig.com
Overview
Overview
The Allegiant®light bar is a single-level LED light bar with ROCTM (Reliable On-Board
Circuitry) and Solaris®LED technologies. ROC eliminates approximately 85 percent of
potential failure points by incorporating a printed circuit board (PCB) in one assembly
to substantially reduce the number of electrical connections. Solaris S2 LED modules
use oset, complex, reflector surfaces for accurate beam-shaping and the highest
optical eciency. The reflectors’ overlapping, 360-degree lighting eliminates weak
spots and provides an o-axis warning around the light bar.
LED Lights, Colors, and Flash Patterns
The microprocessor inside the light bar supplies two priority operational modes
and a library of 28 flash patterns. To increase the safety of ocers, pedestrians, and
motorists, light bars have standard front and rear cuto and dimming.
Multi-color heads are available with up to two dierent colored LEDs. Individual
Allegiant light heads can flash between colors.
Electrical System
The Allegiant light bar is protected against reversed polarity damage. The Allegiant
light bar can be installed in any vehicle with a 12-volt negative-ground electrical
system.
Controller Option
Allegiant Tow bar is configurable for Discrete control. +12 Vdc is applied to the
conductor cable to activate light bar functions.
LOW LIGHT HAZARD: Enabling the Low Power function in the light bar may
cause the light output to fall below certain current light output standards and
guidelines for emergency warning lights. Use extreme caution when using
this function. Ensure that the ambient light conditions are low enough that
you are seen and that the reduction of glare from the light bar is safer than full
light output in the situation. Failure to heed this warning may result in serious
injury or death to you or others in your vicinity.
Product Specications
Operating and technical specifications for the Allegiant light bar are listed in this
section.
Table 1 Dimensions
Model ALGT61
Length 60.9 in (154.7 cm)
Height 2.0 in (5.1 cm)
Width 11.2 in (28.4 cm)
Weight* 30.2 lb (13.7 kg)
*With standard mounting feet