Whelen Engineering Company, Inc.
5 years warranty

M Series combination warning and driving light.

  • Brake/tail/turn, turn, and back-up lights meet applicable SAE requirements
  • Hard-coated lenses
  • Surface mounts via two screws for easy installation
  • A variety of mounting brackets and optional Chrome or Black flanges are available
  • Can be mounted vertically or horizontally
  • Housing allows easy mounting of M4 lightheads in the factory fog light openings of the 2015-2018 Chevy Tahoe and 2015-2018 Ford F-150


WARNING: These products may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit whelen.com/regulatory.


M4 Series

M4 Standard: 3.4″ (86mm) H x 5.5″ (139mm) W x 1.4″ (35mm) D 

M4 V-Series: 3.4″ (86mm) H x 5.5″ (139mm) W x 1.8″ (46mm) D 


Amps Simultaneous: 1.5 (peak), .6 (average)

Alternating: .75 (peak), .3 (average)

M4DW*: 1.0 (peak), .4 (average)

Light Options Single or Split color


Internal flasher+

Lenses Clear


Flash Patterns* Single color: 125 Scan-Lock™ flash patterns

Double color: 64 Scan-Lock flash patterns

Certifications SAE Class 1 (warning)


NFPA 1901

NFPA 1917



Warranty Five year warranty

* Number of sequencing combinations vary by model

+ Sync or low power functions