(A) A person shall not repair, or make any repairs, or add or install any part or accessory to or on, any vehicle while the same is upon any public highway or alley.
(B) The provisions of this section do not prohibit the operator of any vehicle which is disabled while upon any public highway or alley to such extent that it is impossible to avoid stopping from making or causing to be made the repairs necessary to enable such vehicle to be moved from the public highway or alley.
(`83 Code, § 10.16.130)