[Code of Federal Regulations]

[Title 49, Volume 5]

[Revised as of October 1, 2005]

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

[CITE: 49CFR393.22]



[Page 392-393]

 

                        TITLE 49--TRANSPORTATION

 

                      DEPARTMENT OF TRANSPORTATION

 

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

Contents

 

       Subpart B_Lamps, Reflective Devices, and Electrical Wiring

 

Sec. 393.22  Combination of lighting devices and reflectors.



    (a) Permitted combinations. Except as provided in paragraph (b) of 

this section, two or more lighting devices and reflectors (whether or 

not required by the rules in this part) may be combined optically if--

    (1) Each required lighting device and reflector conforms to the 

applicable rules in this part; and

    (2) Neither the mounting nor the use of a nonrequired lighting 

device or reflector impairs the effectiveness of a required lighting 

device or reflector or causes that device or reflector to be 

inconsistent with the applicable rules in this part.

    (b) Prohibited combinations. (1) A turn signal lamp must not be 

combined optically with either a head lamp or other



[[Page 393]]



lighting device or combination of lighting devices that produces a 

greater intensity of light than the turn signal lamp.

    (2) A turn signal lamp must not be combined optically with a stop 

lamp unless the stop lamp function is always deactivated when the turn 

signal function is activated.

    (3) A clearance lamp must not be combined optically with a tail lamp 

or identification lamp.



[39 FR 26908, July 24, 1974]