Polarity reversing switches were a factory item installed to help prevent the burning of contact points.
They were often removed by mechanics that worked on the cars.
This part fits most 1946 1947 1948 Chevrolet Cars and Trucks.; exceptions may apply. Please read the complete description to see if this part fits your specific vehicle and application.
This product can expose you to a chemical, which is known to the State of California to cause cancer or reproductive harm.
For more information go to www.P65Warnings.ca.gov