Chevrolet Corvair Radio Display Bulb Size

Additional Notes

• The Chevrolet Corvair radio display uses two bulb types across its model years: the 1893 for 1965-1969 and the 1891 for 1960-1964.
• Both the 1893 and 1891 are ANSI-standardized bulb types recognized in the United States and Canada, meaning they conform to a defined set of electrical and physical characteristics rather than being proprietary to a single manufacturer.
• Each bulb type is classified as a miniature wedge T5, a form factor in which the base of the bulb itself acts as the connector by wedging directly into a socket, with no separate metal base or pins required.
• Both types operate at 12 volts and 2 watts, which is consistent with the low-power illumination demands of a radio display application in a 12-volt automotive electrical system.
• Although the 1891 and 1893 share the same voltage rating, wattage, T5 form factor, and wedge base type, they are distinct ANSI part numbers and are not confirmed as interchangeable by these specifications.
• The T5 designation refers to a tubular bulb with a width of five-eighths of an inch, a standard sizing convention used across the ANSI miniature bulb classification system.
• At 2 watts on a 12-volt circuit, each bulb draws approximately 167 milliamps, which is a characteristic low-current draw typical of instrument and display lighting in this era of vehicle production.