Whelen UHF2150A User Manual
®
ENGINEERING COMPANY INC.
51 Winthrop Road
Chester, Connecticut 06412-0684
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
Installation Guide:
UHF2150A High Beam Flasher
IMPORTANT NOTES!
• The use of a flashing headlight system may be
regulated by state, county, or municipal authorities. It
is the responsibility of the end user to comply with
these regulations.
• It is the responsibility of the installer to make sure that
the high beam and low beam filaments of a dual
filament bulb never
heat generated by this condition will melt the headlight
assembly. The brown disable wire may have to be
connected to the parking lights or the low beams to
override the flasher and prevent both filaments from
coming on simultaneously.
• The installation of a headlight flasher system requires
a modification to the standard headlight wiring
harness. This modification may effect the warranty of
your vehicle. It is the responsibility of the end user to
verify the warranty conditions with the vehicle
manufacturer. Also, the use of a headlight flasher may
shorten the high beam bulb life.
• Before attempting the installation of the UHF2150A
headlight flasher, thoroughly read and understand
instructions and steps shown below!
• Disconnect the battery from the electrical system
before attempting any part of this installation!
• All customer supplied wires that connect to the
positive terminal of the battery must be sized to supply
at least 125% of the maximum operating current and
FUSED at the battery to carry the load. DO NOT USE
CIRCUIT BREAKERS WITH THIS PRODUCT!
Installation
There are two different switching methods used to
activate the headlights/parking lights in a motor vehicle;
Positive-Side Switching and Ground-Side Switching.
For example, the headlights may use Positive-Side
switching, while the parking lights may use Ground-Side
switching. Before installing this product, it will be
necessary to contact the vehicle manufacturer to
determine which methods are used. After the proper
methods have been established, follow the appropriate
Automotive: Flashers
procedure, based on the method used by the headlight
system.
come on together. The excessive
If Your Headlights are Positive-Side Switched...
1. Mount the flasher in the engine compartment near
the headlights.
2. GROUND - Connect the BLACK wire to the
vehicle’s chassis ground.
3. NIGHT CUTOUT - BROWN - Connect this wire to
the parking light or low beam circuit to disable the
flasher when headlights are on. This is to prevent
both filaments in a dual filament bulb from being on
simultaneously (or if required in your jurisdiction).
4. High Beam Override - Splice the WHITE wire into
the circuit that the BLUE/WHITE wire is to be
connected to in step 5. Splice the WHITE/BLACK
wire into the circuit that the ORANGE wire is to be
connected to in step 7.
5. Driver Side Lamp - Locate the wire that connects the
driver side high beam lamp to the headlight dimmer
switch. Cut this wire at a point 3 inches away from
the lamp. Connect the BLUE wire to the wire that
connects to the high beam lamp. Connect the
WHITE/BLUE wire to the wire that connects to the
headlight dimmer switch.
6. Passenger Side Lamp - Locate the wire that
connects the passenger side high beam lamp to the
headlight dimmer switch. Cut this wire at a point 3
inches away from the lamp. Connect the YELLOW
wire to the wire that connects to the high beam
lamp. Connect the WHITE/YELLOW wire to the wire
that connects to the headlight dimmer switch.
7. On/Off Control - Connect the ORANGE wire to a
+12VDC power switch (200 mA MIN.(user
supplied)).
8. Lamp Feed - Connect the RED wire, fused at 15
Amps (customer supplied) to the POS (+) battery
terminal.
If Your Headlights are Ground-Side Switched...
NOTE: Daytime Running Lights may control the +12VDC
supplied to the headlights. Before proceeding, unplug
each headlight and verify that while the vehicle is running, +12VDC is being provided. This flasher will not
operate properly if +12VDC is not available.
©1998 Whelen Engineering Company Inc.
Form No.13510E (102909)
Page 1
1. Mount the flasher in the engine compartment near the
headlights.
2. GROUND - Connect the BLACK wire to the vehicle’s chassis
ground.
3. NIGHT CUTOUT - BROWN - Connect this wire to the parking
light or low beam circuit to disable the flasher when
headlights are on. This is to prevent both filament in a dual
filament bulb from being on simultaneously (or if required in
your jurisdiction).
4. High Beam Override - Connect the WHITE wire to the
vehicle’s chassis.
Splice the WHITE/BLACK wire into the circuit that the
WHITE/BLUE wire is to be connected to in step 5.
5. Driver Side Lamp - Locate the wire that connects the driver
side high beam lamp to the headlight dimmer switch. Cut this
wire at a point 3 inches away from the lamp. Connect the
BLUE wire to the wire that connects to the high beam lamp.
Connect the WHITE/BLUE wire to the wire that connects to
the headlight dimmer switch.
6. Passenger Side Lamp - Locate the wire that connects the
passenger side high beam lamp to the headlight dimmer
switch. Cut this wire at a point 3 inches away from the lamp.
Connect the YELLOW wire to the wire that connects to the
high beam lamp. Connect the WHITE/YELLOW wire to the
wire that connects to the headlight dimmer switch.
7. On-Off Control - Connect the ORANGE wire to a +12VDC
power switch (200 mA MIN.(customer supplied)).
8. Lamp Feed - Connect the RED wire to the vehicle’s chassis
ground.
Flashrate Selection
There are 4 available flashrates for the UHF2150A. These rates
are determined by the Scan-Lock™ wire (WHT/VIO).
To advance to the next flashrate, apply +12VDC to the WHT/VIO
wire for less than 1 second. To cycle to the previous flashrate,
apply +12VDC for more than 1 second.
After the desired flashrate has been selected, be sure to insulate
the exposed portion of the Scan-Lock wire.
Flashrate List
1. ModuFlash™
2. SingleFlash 280 (Alt)
3. DoubleFlash 140 / SingleFlash 140 (Sim)
4. DoubleFlash 140 / SingleFlash 280
5. SingleFlash 140 / DoubleFlash 75 (Sim
6. SingleFlash 90 (Alt)
7. SingleFlash 140 (Alt)
Alt = Alternating Sim = Simultaneous
Positive-side Switched Headlights
CUT CUT
DRIVER
SCAN-LOCK™
WHT / BLU
XX
BLU
HI HILO LO
WHT / VIO
UHF2150A
WHT
WHT / YEL
YEL
RED
ORANGE
WHT/BLK
BLACK
BRN
WHT / BRN
PASS
GROUND
15 Amp Fuse
(Customer Supplied)
+12VDC
Negative-side Switched Headlights
DRIVER
LO HI HI
CUT CUT
WHT/VIO
SCAN-LOCK™
BLU
XX
WHT / BLU
UHF2150A
WHT/BLK
WHT
GROUND
YEL
WHT / YEL
BRN
WHT / BRN
PASS
RED
ORN
BLK
LO
GROUND
GROUND
LOW BEAM SWITCH (+)
HIGH BEAM SWITCH (+)
PARKING LIGHTS
(GROUND ACTIVE)
(+12VDC ACTIVE)
PARKING LIGHTS
CONTROL +12VDC
BATTERY +12VDC
Page 2
PARKING LIGHTS
(GROUND ACTIVE)
LOW BEAM SWITCH (-)
HIGH BEAM SWITCH (-)
CONTROL +12VDC
(+12VDC ACTIVE)
PARKING LIGHTS
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