[Traf. Code § 53a]
No person shall drive or move, and no owner shall cause or knowingly permit to be driven or moved, on any highway any vehicle or combination of vehicles which is in such unsafe condition or is so loaded as to endanger any person or which does not contain those parts or is not at all times equipped with such equipment, in proper condition and adjustment, as is required by this article, or which is equipped in any manner in violation of this article.