
®
ENGINEERING COMPANY INC.
51 Winthrop Road
Chester, Connecticut 06412-0684
ALPHA Switches 1-4
Wiring Guide:
Phone: (860) 526-9504
Fax: (860) 526-4078
Internet: www.whelen.com
Sales e-mail: autosale@whelen.com
Canadian Sales e-mail: autocan@whelen.com
Customer Service e-mail: custserv@whelen.com
DANGER! Sirens produces extremely loud emergency warning tones! Exposure to these
tones without proper and adequate hearing protection, could cause ear damage and/or hearing
loss! The Occupational Safety & Health Administration (www.osha.gov) provides information
necessary to determine safe exposure times in Occupational Noise Exposure Section 1910.95.
Until you have determined the safe exposure times for your specific application, operators and
anyone else in the immediate vicinity should be required to wear an approved hearing protection
device. FAILURE TO FOLLOW THIS RECOMMENDATION COULD CAUSE HEARING LOSS!
Safety First
This document provides all the necessary information to allow your Whelen product to be properly and safely installed.
Before beginning the installation and/or operation of your new product, the installation technician and operator must
read this manual completely. Important information is contained herein that could prevent serious injury or damage.
• Proper installation of this product requires the installer to have a good understanding of automotive electronics,
systems and procedures.
• If mounting this product requires drilling holes, the installer MUST be sure that no vehicle components or other
vital parts could be damaged by the drilling process. Check both sides of the mounting surface before drilling
begins. Also de-burr any holes and remove any metal shards or remnants. Install grommets into all wire
passage holes.
• If this manual states that this product may be mounted with suction cups, magnets, tape or Velcro®, clean the
mounting surface with a 50/50 mix of isopropyl alcohol and water and dry thoroughly.
• Do not install this product or route any wires in the deployment area of your air bag. Equipment mounted or
located in the air bag deployment area will damage or reduce the effectiveness of the air bag, or become a
projectile that could cause serious personal injury or death. Refer to your vehicle owner’s manual for the air bag
deployment area. The User/Installer assumes full responsibility to determine proper mounting location, based
on providing ultimate safety to all passengers inside the vehicle.
• For this product to operate at optimum efficiency, a good electrical connection to chassis ground must be
made. The recommended procedure requires the product ground wire to be connected directly to the NEGATIVE
(-) battery post.
• If this product uses a remote device to activate or control this product, make sure this control is located in an
area that allows both the vehicle and the control to be operated safely in any driving condition. DO NOT
ATTEMPT TO ACTIVATE OR CONTROL THIS DEVICE IN A HAZARDOUS DRIVING SITUATION.
• It is recommended that these instructions be stored in a safe place and
referred to when performing maintenance and/or reinstallation of this
product.
• FAILURE TO FOLLOW THESE SAFETY PRECAUTIONS AND
INSTRUCTIONS COULD RESULT IN DAMAGE TO THE PRODUCT OR
VEHICLE AND/OR SERIOUS INJURY TO YOU AND YOUR PASSENGERS!
ACTIVATION OF THIS
SIREN MAY DAMAGE
UNPROTECTED EARS!
CAUTION
Loud siren noise can cause
hearing damage and/or loss.
Wear
Refer to OSHA Section 1910.95 prior
Protection!
to putting ANY siren into service!
Automotive: Sirens/Switches
For warranty information regarding this product, visit www.whelen.com/warranty
©1998 Whelen Engineering Company Inc.
Form No.13106E (050608)
Page 1

WARNING!
DISCONNECTING THE VEHICLE BRAKE LAMP
CIRCUIT USING ANY SIRENS WITH RELAY OUTPUTS
OR SWITCH CONTROLLERS COULD CAUSE
VEHICLE OR PROPERTY DAMAGE, SERIOUS INJURY
OR EVEN DEATH.
DISABLING THIS CIRCUIT IS A VIOLATION OF THE
FEDERAL MOTOR VEHICLE SAFETY STANDARD
FOR THE THIRD BRAKE LIGHT, AS WELL AS REAR
BRAKE LIGHTS.
FUNCTIONS THAT BLACK OUT THE REAR BRAKE
LIGHTS (SOMETIMES CALLED “BRAKE LIGHT CUT
OUT”) MAY INTERFERE WITH THE BRAKE SHIFT
LOCK MECHANISM, AND CAUSE THE VEHICLE TO
MOVE UNEXPECTEDLY AND DANGEROUSLY.
DISCONNECTING THE BRAKE LIGHTS IN ANY WAY
IS AT YOUR OWN
RISK AND IS NOT RECOMMENDED
BY WHELEN.
Page 2

SWITCH ASSEMBLY (Alpha 1)
Connecting the GREEN wire to the wire(s) below will enable the following specific siren tones:
WHITE/BROWN = WAIL WHITE/ORANGE = Hands Free
WHITE/RED = YELP WHITE/BROWN + WHITE/RED = PIERCER
BUTT SPLICES
RED
WHT/GRN
GRN
SEE OPTION TABLE
HORN
RELAY
CUT
WIRE
GRY
WHT
ALPHA™
REMOTE
AMPLIFIER
ALL DIP
SWITCHES
DOWN
(DEFAULT)
P2-1 RED (+12V)
P2-2 WHT/GRN (H/R)
P2-3 WHT/BRN (CTRL 1)
P2-4 WHT/RED (CTRL 2)
P2-5 WHT/ORG (CTRL 3)
P2-6 WHT/YEL (CTRL 4)
P1-4 ORG
P1-3 BROWN
P1-2 BLACK
P1-1
RED
10 AMP
FUSE
BATTERY
100 WATT
SPEAKER
+
NO CONNECTION
SWITCH ASSEMBLY (Alpha 2)
Connecting the GREEN wire to the wire(s) below will enable the following specific siren tones:
WHITE/BROWN = WAIL WHITE/ORANGE = Hands-Free
WHITE/RED = YELP WHITE/BROWN + WHITE/RED = PIERCER™
A simulated Airhorn tone is always available by pressing SW2.
VEHICLE
HORN
GRN
RED
WHT/GRN
WHT
SW1
GRY
ALPHA™
REMOTE
AMPLIFIER
ALL DIP
SWITCHES
DOWN
(DEFAULT)
P2-1 RED (+12V)
P2-2 WHT/GRN (H/R)
P2-3 WHT/BRN (CTRL 1)
P2-4 WHT/RED (CTRL 2)
P2-5 WHT/ORG (CTRL 3)
P2-6 WHT/YEL (CTRL 4)
P1-4 ORG
P1-3 BROWN
P1-2 BLACK
P1-1
RED
10 AMP
FUSE
BATTERY
100 WATT
SPEAKER
+
BUTT SPLICES
SEE OPTION TABLE
RED
WHT/GRN
GRN
HORN
RELAY
Page 3
CUT
WIRE
GRY
WHT
SW2
VEHICLE
HORN
GRN
RED
WHT/GRN
WHT
SW1
GRY

SWITCH ASSEMBLY (Alpha 3)
Connecting the GREEN wire to the wire(s) below will enable the
following specific siren tones in the “TONE 1” switch position of SW1:
WHITE/BROWN = WAIL
WHITE/RED = YELP
WHITE/ORANGE = Hands-Free
BUTT SPLICES
Connecting the VIOLET wire to the wire(s) below will enable the following specific siren tones in the “TONE 2” switch position of SW1:
WHITE/BROWN = WAIL
WHITE/RED = YELP
WHITE/ORANGE = Hands-Free
A simulated Airhorn tone is always available by pressing SW2.
RED
WHT/GRN
GRN
VIO
ALPHA™
REMOTE
AMPLIFIER
ALL DIP
SWITCHES
DOWN
(DEFAULT)
P2-1 RED (+12V)
P2-2 WHT/GRN (H/R)
P2-3 WHT/BRN (CTRL 1)
P2-4 WHT/RED (CTRL 2)
P2-5 WHT/ORG (CTRL 3)
P2-6 WHT/YEL (CTRL 4)
P1-4 ORG
P1-3 BROWN
P1-2 BLACK
P1-1
RED
10 AMP
FUSE
100 WATT
SPEAKER
+
BATTERY
HORN
RELAY
OPTION TABLE -SWITCH ASSEMBLY (Alpha 4)
Connecting the GREEN wire to the wire(s) below will enable the
following specific siren tones in the “TONE 1” switch position of SW1:
WHITE/BROWN = WAIL
WHITE/RED = YELP
WHITE/ORANGE = Hands-Free
GRN
RED
DIODE
SW2
VIO
NOTE: GRN = Control for TONE 1
SW1
VIO
VIO = Control for TONE 2
SPLICE
Connecting the VIOLET wire to the wire(s) below will enable the following specific siren tones in the “TONE 2” switch position of SW1:
WHITE/BROWN = WAIL
WHITE/RED = YELP
WHITE/ORANGE = Hands-Free
A simulated Airhorn tone is only available when SW1 is in the ON
position. Activate via SW3.
VEHICLE
HORN
ALPHA™
REMOTE
AMPLIFIER
ALL DIP
SWITCHES
DOWN
(DEFAULT)
P2-1 RED (+12V)
P2-2 WHT/GRN (H/R)
P2-3 WHT/BRN (CTRL 1)
P2-4 WHT/RED (CTRL 2)
P2-5 WHT/ORG (CTRL 3)
P2-6 WHT/YEL (CTRL 4)
P1-4
ORG
BRN
P1-3
P1-2
BLK
P1-1
RED
10 AMP
FUSE
BATTERY
100 WATT
SPEAKER
+
BUTT SPLICES
RED
WHT/GRN
GRN
VIO
BLK
HORN
RELAY
GRN
BLK
SW3
VIO
WHT WHT
GRY
SW2 SW1
VIO
REDRED
GRY
NOTE: GRN = Control for TONE 1
VIO = Control for TONE 2
CUT
WIRE
Page 4
VEHICLE
HORN
WHT/GRN
WHT