The Ford L9501 front side marker uses a 1895 bulb size while the rear side marker requires a 194 bulb size. The replacement chart covers 1997 to 1998 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford L9501 uses two distinct bulb sizes across its side marker positions: the 1895 for the front and the 194 for the rear, covering the 1997-1998 model years.
Both the 1895 and 194 bulbs are classified under ANSI standards applicable to the US and Canadian markets, meaning they conform to a standardized specification for electrical and physical characteristics.
The 1895 is a T5 miniature wedge bulb, where T5 refers to a tubular envelope roughly 5/8 of an inch wide. It operates at 12V and draws 0.9W, placing it among the lower-wattage bulbs in automotive marker lighting applications.
The 194 is a T10 miniature wedge bulb, a physically larger wedge type than the T5. It also operates at 12V but draws 3.78W, making it notably higher in power consumption than the 1895 used at the front.
Because the 1895 and 194 share the same wedge base style but differ in envelope size and wattage, they are not interchangeable between the front and rear side marker positions on the Ford L9501.
The wattage difference between the front 1895 (0.9W) and the rear 194 (3.78W) reflects a common automotive practice of using brighter, higher-wattage bulbs at the rear to improve visibility from following traffic.