Threats by manufacturer or wholesaler as prima facie evidence of intent to violate law.

Any threat, expressed or implied, made directly or indirectly to any motor vehicle dealer, by any manufacturer, or wholesale distributor on authority or with the knowledge of any such manufacturer, or wholesale distributor, that such person will discontinue to sell, or will terminate a contract to sell motor vehicles to such dealer unless such dealer finances the purchase or sale of motor vehicles only with or through a designated finance company or sells and assigns the conditional sales contracts, chattel mortgages, or other paper arising from her or his retail sales of motor vehicles only to a designated finance company, shall be prima facie evidence of the fact that such manufacturer or wholesale distributor has sold or intends to sell motor vehicles, on the condition or with the agreement or understanding prohibited in s. 545.02.