Interpretation ID: Huser.1

Mr. Ken Huser
Eldorado National, Kansas
1655 Wall Street
Salina, KS 67401

Dear Mr. Huser:

This responds to your recent e-mail to the National Highway Traffic Safety Administration (NHTSA), in which you ask whether our regulations include requirements for the activation (illumination) of clearance, identification, and side marker lamps on vehicles of 80 inches or more in overall width. Your correspondence stated that you are seeking confirmation of this point because a customer is requesting that you modify a vehicle equipped with front clearance lamps to provide a switch that would allow the operator to turn off those lamps. The answer to your questions is no, although other Federal or State laws may apply in this situation.

By way of background, NHTSA is authorized to issue Federal motor vehicle safety standards (FMVSSs) that set performance requirements for new motor vehicles and items of motor vehicle equipment. It is the responsibility of manufacturers to certify that their products conform to all applicable safety standards before they can be offered for sale (see 49 CFR Part 571). After the first sale of the vehicle, manufacturers, distributors, dealers, and repair businesses are prohibited from "knowingly making inoperative" any device or element of design installed on or in a motor vehicle in compliance with an applicable standard. 49 U.S.C. 30122.

The requirements for lighting equipment are contained in FMVSS No. 108, Lamps, Reflective Devices, and Associated Equipment. As you point out in your e-mail, paragraph S5.5.7 of the standard sets forth activation (illumination) requirements for certain lamps on passenger cars, motorcycles, and on multipurpose passenger vehicles, trucks, and buses less than 80 inches in overall width (e.g., when the parking lamps are activated, the taillamps, license plate lamps, and side marker lamps shall also be activated). It is also correct that, in certain cases, the standard specifies activation requirements for certain lamps on all vehicles, such as paragraph S5.5.3, which provides that the taillamps on each vehicle shall be activated when the headlamps are activated in a steady-burning state. However, the standard contains no similar requirements for any electrical wiring or switching relationship between the clearance, identification, and side marker lamps on vehicles of 80 inches or more in overall width, and any other required lamps.

However, I would note that other authorities with jurisdiction over vehicles operational safety may have addressed this issue, so you may wish to make further inquiries before undertaking modifications to the vehicle in question. Specifically, the Departments Federal Motor Carrier Safety Administration (FMCSA) has jurisdiction over interstate motor carriers operating in the United States. You may wish to contact FMCSA at (202) 366-4009 to obtain further information regarding any FMCSA regulations dealing with vehicle operating requirements related to lighting.

In addition, States have the authority to regulate the use and licensing of vehicles operating within their jurisdictions. Therefore, you may wish to check with the Department of Motor Vehicles in any State where the vehicle will be used regarding any such requirements.

I hope you find this information useful. If you have further questions, please feel free to contact Eric Stas of my staff at this address or by telephone at (202) 366-2992.

Sincerely,

Jacqueline Glassman
Chief Counsel

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d.10/6/04