American Motors Gremlin Dome Light Bulb Size

Additional Notes

• The 561 is the most frequently specified dome light bulb across the American Motors Gremlin lineup, covering model years 1971-1975 and 1977-1978.
• The 561 is an ANSI-standard festoon bulb rated at 12 volts and 12 watts, with a 44mm body length and end-cap contacts at both terminals.
• The festoon design means the bulb seats by pressing lengthwise between two spring clips rather than inserting into a socket, which is a common configuration in automotive dome light housings of that era.
• The 1970 American Motors Gremlin uses the 562 bulb, which shares the same 44mm festoon form factor, voltage, and wattage as the 561.
• Although the 561 and 562 are physically and electrically similar, they carry distinct ANSI designations and are not listed as interchangeable within these specifications.
• The 1976 Gremlin is the only model year in this range specified to use the 1893 bulb, which is a T5 miniature wedge type rated at 12 volts and 2 watts.
• The 1893 wedge bulb operates at a significantly lower wattage than the festoon types used in surrounding years, reflecting a different lamp housing design for that model year.
• A wedge bulb, such as the 1893, uses a pinched glass base that wedges directly into a socket, with no separate metal contacts, making it physically incompatible with festoon-style spring-clip housings.
• All bulb types listed across the Gremlin's dome light specifications conform to ANSI standards applicable in both the United States and Canada.