American Motors Pacer Dome Light Bulb Size

The American Motors Pacer dome light requires a 561 bulb size for proper illumination within the interior cabin area. Data for the specific bulb application covers the range from 1975 to 1980.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1975-1980	561

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W.	561

Other Locations

Additional Notes

The American Motors Pacer uses the 561 bulb for the dome light across all listed model years, spanning 1975-1980.
The 561 is an ANSI-standardized bulb, meaning its specifications are governed by a formal industry standard recognized in both the United States and Canada.
It is a festoon-type bulb, a cylindrical form factor that makes contact with its circuit through metal caps at each end rather than through a base plug or bayonet fitting.
The 561 bulb has a length of 44mm, which is the physical span between its two end-cap contacts and determines whether it will seat correctly in a given festoon holder.
The bulb operates at 12 volts, consistent with the standard electrical system voltage found in conventional passenger vehicles of this era.
Its rated wattage is 12W, which reflects the power draw of the filament under normal operating conditions.
Because festoon bulbs rely on physical length for proper contact, substituting a festoon bulb of a different length in place of the 561 may result in poor contact or no contact at all within the dome light housing.