Federal Signal #FHL2-SC 90 FPM Headlight Flasher

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A basic, dependable, high-side switched headlight flasher for most Ford and Chevy vehicles.

This compact, reliable, relay-driven flasher offers basic functionality for popular emergency service vehicles in a simple, easily installed package. Electronic timing circuits achieve consistent dual flashing at 90 flashes per minute through its two 10-amp high-side switched circuits. The unit can flash 2?or?4 headlight systems with a total current draw of up to 20 amps. An extremely low standby current protects against unintentional activation.


  • Basic, relay-driven model is an economical solution for large fleets.
  • Multiple flash pattern options are selectable at installation.
  • Plug-n-play versions allow quick installation without interrupting the vehicle electrical system.
  • Splash proof high temperature housing provides protection from external conditions.
  • Activating the high beams automatically disengages the flasher.
  • Features low voltage/reverse polarity protection
  • Includes hardware necessary to mount the unit in a variety of positions
  • Three-year manufacturer?s warranty.


Vehicle Electrical System 12VDC
Maximum Output Current Two 10A circuits per side, 20A total
Circuit Switching High-Side
Standby Current (mA) 3
Low Voltage Protection Yes
Reverse Polarity Protection Yes
Operating Temperature (?C) -35? to +76?
High Beam Deactivation Yes
Flash Patterns 144 fpm, 180 fpm, Random
Mounting Bracket Universal
Height 1.5 in (3.8 cm)
Length 4.0 in (10.2 cm)
Width 2.8 in (7.1 cm)

NOTE: Activation switch is not included. Flasher unit can be operated from any standard single control switch or multi-switch controller circuit capable of handling 20 amps.

FHL2-SC works with the following vehicle models:

  • Chevy Silverado '05-'07
  • Chevy Suburban '04-'07
  • Chevy Tahoe (Non-Police Package) '04-'07
  • Chevy Trail Blazer '05-'07
  • Ford Crown Vic (Police Package) '00, '04, '05
  • Ford Crown Vic (Non-Police Package) '00, '04-'07
  • Ford Expedition '04-'07
  • Ford Explorer '04, '05
  • Ford F-Series Pick-Up '04-'07
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