Wis. Admin. Code Trans 305.33
Windshield defroster-defogger
Cite as Wis. Admin. Code Trans § 305.33
Windshield defroster-defogger.
(1) Every motor vehicle manufactured after January 1, 1955, shall be equipped with a defroster-defogger system. Any motor vehicle lawfully manufactured and operated without a roof, doors or side windows is exempt from the requirements of this section.
(2) The defroster-defogger system shall be capable of removing condensation and frost from the windshield.