Quote:
Originally Posted by VictoriaHardware
They are required by law on certain vehicles. Anyway, you always see them on medium and heavy trucks. Many times see them on light duty trucks, such as 1 ton duallys.
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Quote:
Originally Posted by davepl
I was under the impression that marker lights weren't required until you were over 79.8" in width. Is there a height trigger as well? Or why would a non-dually C30 require it while a C20 wouldn't? That doesn't make a lot of sense at first blush.
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The 5 lights are actually required due to two separate requirements, both of which are directly related to width. The two outside lights are "clearance lamps", while the 3 in the middle are "identification lamps". To be placed as high as practical. 80 inches is the cutoff if I remember correctly. Like mentioned above, you can have them on any vehicle.
My 1/2 ton Ford (I know, I know) has to have them because of having extra width.