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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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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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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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.

88 Allegiant®Tow Discrete Light Bar
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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
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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

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Overview
Table 2 Light Specications
Lighting Option Current Draw Lamp Technology Reector Style
LED (all heads) 1.0 A in Steady-Burn Mode High-brightness LED Offset, compound curve,
polished reector
Table 3 Electrical and Temperature
Model Electrical Potential Current Draw
(50% Flash Rate)
Operating Temp.
ALGT61 12.8 Vdc 13.0 A -40°F to 149°F (-40°C to 65°C)
Figure 1 Light Bar Positions
PS
5
6
FRONT
1234
L1
78
L
DS
PS
FRONT
12 3 4 5 6 7 8
L1
9
101112131415
16
L
DS
FRONT
432
1
L
98765
19 18 17 16 15 14 13 12
DS
20 11
L1
10
PS
DS L
12 3 4
FRONT
20 19 18 17 16 15 14 13
12
11
L1
109876
5
212223
24
PS
24 23 22 21
5 6 7 8 9 10
L1
11 12 13 14
15
1617181920
FRONT
432
1
LDS
252627
28
PS
28 27 26 25
5 6 7 8 11 12
L1
13 14 15 16
17
1819202122
FRONT
432
1
LDS
293031
32
PS
9 10
2324

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Setting the Light Bar Flash Pattern
Setting the Light Bar Flash Pattern
HEAVY OBJECT: Use lifting aids and proper lifting techniques when removing
or replacing this product. Failure to heed this warning may cause personal
injury.
Carefully unpack the light bar assembly and any other products included in the
shipment. Inspect them for damage that may have occurred during shipping. If a
product has been damaged, do not install or operate it. Immediately file a claim with
the carrier describing the damage.
Carefully check all envelopes, shipping labels, and tags before removing or
destroying them. If you are missing any parts, contact Customer Support at
1-800-264-3578, 7 to 5 , Monday through Friday (CT).
Setting the Light Bar Flash Pattern
Although the Allegiant®light bar is configured and programmed at the factory, you
may want to change default settings and flash patterns before you install the light bar.
Before you begin, decide if you want to change these default settings:
Discrete Bars
MODE 1, 2
You can select a pattern for each mode from the light bar’s library of 28 patterns.
Making the Electrical Connections
To supply power to the light bar, use a fully charged 12-volt automotive battery.
Follow these steps:
1. Place the light bar on a sturdy, flat surface.
2. Attach the Black wire to the negative battery (–GND) terminal.
3. Attach the Red and/or Yellow power line through a fuse rated in Tables 6 and 7
to the positive battery (+BAT) terminal. If a switch is desired, attach the switch
between the fuse and the battery.
Setting the Light Bar Flash Pattern
The light bar can change the flash pattern for Modes 1 and 2. To change the flash
pattern:
1. Attach the Black wire to the negative battery (-GND) terminal.
2. Apply +BAT to the Red and/or Yellow wire to turn on the light bar. If Mode 2 is
being changed, apply +BAT to the Brown wire as well.
3. Quickly tap the Brown/White wire to +BAT three times.

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Setting the Light Bar Flash Pattern
4. Tap the Brown/White wire once to change to the next pattern. The pattern dims as
the Brown/White wire is held to +BAT.
5. Repeat step 4 until the desired pattern is selected.
6. Turn the light bar o. Wait at least 5 seconds and turn the light bar on. Verify that
the pattern has been saved.
Mode 1 flash patterns are listed in Table 4.
Mode 2 enables flashing white to the front by default. It can be reprogrammed to a
dierent flash pattern with OR without flashing white. See Table 5 for the pattern list
for Mode 2.
Table 4 Allegiant®Flash Patterns
# Description # Description # Description
1 Pattern 1* 11 Pattern 11 21 Pattern 21
2 Pattern 2* 12 Pattern 12 22 Pattern 22
3 Pattern 3* 13 Pattern 13 23 Pattern 23
4 Pattern 4* 14 Pattern 14 24 Pattern 24
5 Pattern 5* 15 Pattern 15 25 Pattern 25*
6 Pattern 6* 16 Pattern 16 26 Pattern 26
7 Pattern 7 17 Pattern 17 27 Pattern 27
8 Pattern 8* 18 Pattern 18 28 Steady On
9 Pattern 9 19 Pattern 19
10 Pattern 10 20 Pattern 20
*Conforms to California Title 13.

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Setting the Light Bar Flash Pattern
Table 5 Allegiant Discrete Mode 2 Flash Patterns
# Description # Description # Description
1 Pattern 1* 21 Pattern 11 41 Pattern 21
2 Pattern 1 + Flash WHT front* 22 Pattern 11 + Flash WHT front 42 Pattern 21 + Flash WHT front
3 Pattern 2* 23 Pattern 12 43 Pattern 22
4 Pattern 2 + Flash WHT front* 24 Pattern 12 + Flash WHT front 44 Pattern 22 + Flash WHT front
5 Pattern 3* 25 Pattern 13 45 Pattern 23
6 Pattern 3 + Flash WHT front* 26 Pattern 13 + Flash WHT front 46 Pattern 23 + Flash WHT front
7 Pattern 4* 27 Pattern 14 47 Pattern 24
8 Pattern 4 + Flash WHT front* 28 Pattern 14 + Flash WHT front 48 Pattern 24 + Flash WHT front
9 Pattern 5* 29 Pattern 15 49 Pattern 25*
10 Pattern 5 + Flash WHT front* 30 Pattern 15 + Flash WHT front 50 Pattern 25 + Flash WHT front*
11 Pattern 6* 31 Pattern 16 51 Pattern 26
12 Pattern 6 + Flash WHT front* 32 Pattern 16 + Flash WHT front 52 Pattern 26 + Flash WHT front
13 Pattern 7 33 Pattern 17 53 Pattern 27
14 Pattern 7 + Flash WHT front 34 Pattern 17 + Flash WHT front 54 Pattern 27 + Flash WHT front
15 Pattern 8* 35 Pattern 18 55 Steady On
16 Pattern 8 + Flash WHT front* 36 Pattern 18 + Flash WHT front 56 Steady On + Flash WHT front
17 Pattern 9 37 Pattern 19
18 Pattern 9 + Flash WHT front 38 Pattern 19 + Flash WHT front
19 Pattern 10 39 Pattern 20
20 Pattern 10 + Flash WHT front 40 Pattern 20 + Flash WHT front
*Conforms to California Title 13.
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.

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Wiring the Allegiant Light Bar
Wiring the Allegiant Light Bar
Before proceeding, ensure that the light bar has been installed on the vehicle roof
in accordance with the instructions included with the mounting kit. Depending on
the type of vehicle and mounting system feature, there are two options available
for installing the light bar to the roof of the vehicle: hook-on mounting or permanent
mounting.
INSTALLATION PRECAUTION: 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
elds. 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.
Planning the Electrical Installation
The light bar is completely wired at the factory and does not require any additional
internal wiring. All the conductors necessary for control of any and all basic and
optional functions are contained in the nine-conductor cable. The basic light functions
of the Allegiant®must be controlled by appropriately rated switches.
To prevent damage to the light bar and vehicle and ensure that all equipment
operates properly, carefully plan where to mount and wire the light bar and controlling
equipment:
1. Verify that the light bar and mounting hardware fit the vehicle.
2. Determine where to mount the light bar on the vehicle.
3. Determine where to mount the controlling equipment:
• Trunk or remote location
• Console
AIRBAG DEPLOYMENT: Do not install equipment or route wiring in the
deployment path of an airbag. Failure to observe this warning will reduce the
effectiveness of the airbag or potentially dislodge the equipment, causing
serious injury or death.
4. Decide where to route wiring around airbag areas.
5. Decide where to route the light bar power and ground wires.
6. To make wiring easier, remove the seats and spare tire and pull down the
headliner where needed.
7. Separate all electronic equipment wiring from two-way radio equipment wiring.

1616 Allegiant®Tow Discrete Light Bar
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Wiring the Allegiant Light Bar
8. To avoid interference, keep two-way radio antennas a minimum of 18 inches
(45.7cm) away from warning equipment.
9. Whenever possible, run full wire lengths. DO NOT splice the wires.
10. Do not coil excess wire. Leave a drain loop for servicing.
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.
11. When you frame-ground the equipment, use the manufacturer-supplied ground
locations in the vehicle. Ensure that this manufacturer-supplied ground location is
bare metal to provide proper grounding.
IMPORTANT: After the installation, frequently inspect the light bar and mounting feet
to ensure that all fasteners and brackets are tight.
Wiring the Stop/Turn/Tail Lights
The light bar’s stop/turn/tail lights are a factory-configured option. The light bar is
shipped with the option’s three-conductor cable ready for splicing into the vehicle
harness.
BATTERY EXPLOSION: To avoid a battery explosion, always disconnect the
negative battery cable rst 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.
Before splicing into the vehicle's harness to install the Stop/Turn/Tail Lights, refer
to the vehicle manufacturer's wiring diagram to follow mandated safety functions in
order to keep proper vehicle operation.
After mounting and wiring the light bar to the vehicle, follow these steps to wire the
light bar’s stop/turn/tail lights:
1. Disconnect the vehicle battery’s negative ground cable and then the positive
cable.
2. Locate the three-conductor cable exiting the light bar with red, black, and green
wires.
NOTE: If installing the option in a vehicle that has its turn signal lights separate
from its brake lights, you must purchase a tail light converter.

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Wiring the Allegiant Light Bar
3. Splice the appropriate cables into the vehicle’s wiring. See Figure 2. The input
leads require a positive (+) 12 Vdc signal to activate.
Figure 2 Stop/turn/tail wiring between light bar and vehicle harness
4. Reconnect the battery’s positive terminal and then the negative terminal.
5. Test to verify that the light bar’s stop/turn/tail lights turn on and o with the
vehicle’s stop/turn/tail lights.
Table 6 Wire functions and fuse
requirements
Wire Color Fuse Function
Red 20 A Front Mode 1
Yellow 20 A Rear Mode 1
Blue 12 A Worklight/Bed Light
Orange 12 A Scene Front
Gray 5 A Right SignalMaster
Green 5 A Left SignalMaster
Brown N/A Mode 2 Override
Brown/White N/A Dimming
Black N/A Ground
Table 7 Allegiant Discrete with
Preterminated Weathertight Connectors
Wire Color Fuse Function
Red 20 A Front Mode 1
Red/Black 20 A Rear Mode 1
Yellow/Black 12 A Worklight/Bed Light
Yellow 5 A Taillights
Orange 5 A Left Turn/Brake
White 5 A Right Turn/Brake
Blue/Black N/A Mode 2 Override
Light Blue N/A Dimming
Black N/A Ground
Connecting Power to the Light Bar
NOTE: Plan the location of the wire-routing hole in the vehicle roof so that the power
and communication cables do not have tight bends and have some slack to ease
removal.
BATTERY EXPLOSION: To avoid a battery explosion, always disconnect the
negative battery cable rst 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.
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 may cause serious injury or
death.

1818 Allegiant®Tow Discrete Light Bar
Federal Signal www.fedsig.com
Wiring the Allegiant Light Bar
REVERSE POLARITY / MISWIRING: Reverse polarity or incorrect voltage may
damage the light. To avoid damage to the light, ensure that the battery voltage
is the same as the voltage rating of the light and that the correct polarity is
observed.
To make the power connections:
1. Ensure that the lines are adequately fused, as shown in Table 6 or 7 on
page17.
2. Attach the Black wire to the negative battery (–GND) terminal. See Table 6 or 7.
3. Attach each power line through a fuse rated as shown in Figure 3 or 4 to the
positive battery (+BAT) terminal. If a switch is desired, attach the switch between
the fuse and the product.
Figure 3 Power and cable connections
12 V Battery
Black
Ground
20 A SW 1
20 A
12 A
12 A
5 A
5 A
SW 2
SW 3
SW 4
SW 5
SW 6
SW 7
SW 8
Red
Front Mode 1
Yellow
Rear Mode 1
Blue
Worklight/Bedlight
Orange
Scene Front
Gray
Right SignalMaster
Green
Left SignalMaster
Brown
Mode 2 Override
Brown/White
Dimming
SignalMaster Wire
Right Gray
Left Green
Center-Out Gray and Green

19
Installation, Maintenance, and Service Manual
Federal Signal www.fedsig.com
Wiring the Allegiant Light Bar
Figure 4 Weathertight power and cable connections
12 V Battery
Black
Ground
20 A SW 1
20 A
12 A
5 A
5 A
5 A
SW 2
SW 3
SW 4
SW 5
SW 6
SW 7
SW 8
Red
Front Mode 1
Red/Black
Rear Mode 1
Yellow/Black
Worklight/Bedlight
Yellow
Taillights
Orange
Left Turn/Brake
White
Right Turn/Brake
Blue/Black
Mode 2 Override
Light Blue
Dimming
PLUG #1
PLUG #3
PLUG #2

2020 Allegiant®Tow Discrete Light Bar
Federal Signal www.fedsig.com
Maintaining and Servicing the Allegiant
Maintaining and Servicing the Allegiant
BURN HAZARD: After prolonged operation, the unit gets hot and can cause
burns. Do not touch the unit while or shortly after it has been operating.
Always allow the unit to cool before handling it.
HEAVY OBJECT: Use lifting aids and proper lifting techniques when removing
or replacing this product. Failure to follow this warning may cause personal
injury.
This chapter describes how to maintain and service the Allegiant®light bar.
Establishing a regular maintenance and inspection schedule extends the life of the
light bar and ensures safety. For service, support, or replacement parts, contact
the Federal Signal Service Department at 1-800-433-9132, 7 .. to 5 .., Monday
through Friday (CT). For replacement parts and part numbers, see Table 10 on
page27.
Servicing the Light Bar Domes
Servicing the light bar domes includes removing them and inspecting their seals and
hardware to ensure that the domes remain secure and watertight. Inspection also
involves checking the domes for cracks, crazing (hairline cracks), and other defects.
Cleaning the Light Bar Lens or Dome
CRAZING/CLEANING SOLUTIONS: The use of cleaning solutions, such as
strong detergents, solvents, and petroleum products, can cause crazing
(cracking) of the light bar lens and reectors. To clean the reectors, use a
soft, damp cloth. To clean the lens, use a soft cloth and a solution of water and
a mild detergent.
CRAZING/CHEMICALS: Crazed, cracked, or faded lenses or reectors reduce
the light output and the effectiveness of the lighting system. A lens or
reectors showing this type of aging must be replaced. Failure to follow this
warning may result in bodily injury or death.
EQUIPMENT DAMAGE: Do not use a pressure washer to clean the light bar.
Failure to heed this notice will damage the light bar.