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®

ENGINEERING COMPANY INC.

Automotive:

 Lightheads

Installation Manual:

900 Alpha Lighthead

©2003 Whelen Engineering Company Inc. 
Form No.13871 (111103)

Mounting:

1.

Using the dimensions from the template, mark off and drill 
the two 5/16” diameter vent tube holes and the 1” center 
wire hole into the mounting surface. Make sure lighthead 
will not interfere with existing equipment and be aware of 
any items on the opposite side of the mounting surface.

2.

Insert the two vent tubes extending from the rear of the 
lighthead into their holes making sure that the lighthead is 
properly oriented. Using a scribe or similar tool, mark off 
the 4 mounting holes. 

3.

Using a .250” drill bit drill the four mounting holes and 
install the 4 supplied grommets. Install a grommet 

(customer supplied)

 into the 1” wire hole.

4.

Using appropriately sized cable, extend the lighthead wires 
to their connections. Fuse the +12VDC connections at 3 
Amps and test the operation of the lighthead before 
securing it to the vehicle. 

5.

Position the lighthead onto the mounting surface and 
secure the lighthead to the vehicle using four #8 x 1½” 
sheet metal screws. Make sure that the lighthead is 
properly oriented (with the larger of the three LED groups 
to the left).

Wiring:

1.

Plug the interface cable (provided) into the 900ALPHA 
lighthead connector. 

2.

The 9-position “D” connector on the interface cable will be 
connected to one end of a customer supplied serial cable. 
The other end of this cable will connect to the PC used to 
program the lighthead.

3.

Using appropriately sized wire, extend the free RED wire 
to a sw12VDC power source. Fuse this wire @ 3 
amps.

WARNING! All customer supplied wires that connect to the 
positive battery terminal, must be sized to supply 125% of 
the maximum operating current and fused “at the battery” 
to carry that load.

4.

Using appropriately sized wire, extend the free BLACK 
wire to chassis ground.

Software Installation:

1.

Insert the software disc into the CD-ROM drive on the PC. 
Locate and run the file named ‘900ALPHA.exe’ on this 
disc.

2.

Follow the on-screen instructions to install the 
configuration software.

Programing the 900 ALPHA Lighthead:

1.

Connect a 9-pin serial 
cable to the interface 
cable. Connect the 
other end of this cable 
into the serial port on 
the PC.

2.

With the lighthead on, 
start the configuration 
software.

3.

Enter the desired code 
in the appropriate box. 
NOTE: The first 
character MUST be a 
LETTER; the second and third characters MUST be 
NUMBERS.

4.

Adjust the intensity of the display using the slider control. 
The effective range is from 0 (lowest) to 255 (highest).

5.

Press the ‘Program’ button to program the lighthead.

Grey
Black

WHELEN ENG. CO. INC.

SAE-STI-91

DOT

SAE-WW2W5-91

PATENT

PENDING

Red

Red

Red

To PC

Serial Port

Black

Black

51 Winthrop Road
Chester, Connecticut 06412-0684
Phone: (860) 526-9504
Fax: (860) 526-4078
Internet: www.whelen.com
Sales e-mail: [email protected]
Canadian Sales e-mail: [email protected]
Customer Service e-mail: [email protected]

All manuals and user guides at all-guides.com

all-guides.com

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