Interpretation ID: nht88-2.18

TYPE: INTERPRETATION-NHTSA

DATE: 05/06/88

FROM: AUTHOR UNAVAILABLE; Erika Z. Jones; NHTSA

TO: Z. Taylor Vinson

TITLE: FMVSS INTERPRETATION

TEXT:

Subject: Oral Interpretation of Standard No. 108: Optical Combination

From Z. Taylor Vinson Senior Staff Attorney

To: Interpretations Files

Recently a lamp manufacturer phoned to ask whether a replacement lighting device it had developed for installation on trucks and trailers in use would be allowable under Standard No. 108.

The lamp as described is an amber-lensed wrap-around lamp incorporating a clearance lamp to the front and a marker lamp to the side, with one bulb for each function. I replied that the prohibition in S4.4. applicable to clearance lamps forbade their comb ination only with identification lamps and stop lamps, and that if his combination lamp met photometric and mounting requirements applicable to each function, it appeared to be permissible under Standard No. 108.