[Code of Federal Regulations]

[Title 49, Volume 5]

[Revised as of October 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 49CFR393.24]



[Page 393]

 

                        TITLE 49--TRANSPORTATION

 

        CHAPTER III--FEDERAL MOTOR CARRIER SAFETY ADMINISTRATION,

                      DEPARTMENT OF TRANSPORTATION

 

PART 393_PARTS AND ACCESSORIES NECESSARY FOR SAFE OPERATION--Table of Contents

 

       Subpart B_Lamps, Reflective Devices, and Electrical Wiring

 

Sec.  393.24  Requirements for head lamps, auxiliary driving lamps and front fog lamps.



    (a) Headlamps. Every bus, truck and truck tractor shall be equipped 

with headlamps as required by Sec.  393.11(a). The headlamps shall 

provide an upper and lower beam distribution of light, selectable at the 

driver's will and be steady-burning. The headlamps shall be marked in 

accordance with FMVSS No. 108. Auxiliary driving lamps and/or front fog 

lamps may not be used to satisfy the requirements of this paragraph.

    (b) Auxiliary driving lamps and front fog lamps. Commercial motor 

vehicles may be equipped with auxiliary driving lamps and/or front fog 

lamps for use in conjunction with, but not in lieu of the required 

headlamps. Auxiliary driving lamps shall meet SAE Standard J581 

Auxiliary Upper Beam Lamps, July 2004, and front fog lamps shall meet 

SAE Standard J583 Front Fog Lamp, August 2004. (See Sec.  393.7 for 

information on the incorporation by reference and availability of these 

documents.)

    (c) Mounting. Headlamps shall be mounted and aimable in accordance 

with FMVSS No. 108. Auxiliary driving lamps and front fog lamps shall be 

mounted so that the beams are aimable and the mounting shall prevent the 

aim of the lighting device from being disturbed while the vehicle is 

operating on public roads.

    (d) Aiming. Headlamps, auxiliary driving lamps and front fog lamps 

shall be aimed to meet the aiming specifications in FMVSS No. 108 (49 

CFR 571.108), SAE J581, and SAE J583, respectively.



[70 FR 48046, Aug. 15, 2005]