The Autocar ACL uses a 97 bulb size for both front and rear side marker applications. The replacement chart covers 1981 to 1988 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Autocar ACL uses the 97 bulb for both front and rear side marker positions across the 1981-1988 model years.
The 97 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical standards shared across North American markets.
The 97 bulb operates on a 12-volt electrical system and draws 13 watts, placing it in the low-wattage range typical of marker and auxiliary lighting applications.
It uses a BA15s bayonet base, which is a single-contact base type that locks into its socket with a twist-and-push motion rather than a threaded connection.
The 97 is a single-filament bulb, meaning it serves one lighting function only and does not combine, for example, marker and brake functions within a single housing.
The 97 is a variant of the 1156 bulb family. While the two share the BA15s base type, they are not identical, and wattage or voltage differences between variants within that family can affect fitment compatibility.
Because the same bulb size applies to both the front and rear side marker positions across all listed model years, a single bulb specification covers all side marker replacements on the ACL from 1981 through 1988.