Ford E-100 front and rear side marker bulbs utilize a 194 size bulb for both locations. The replacement chart covers vehicle production spanning 1972 to 1983.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford E-100 uses the 194 bulb across all listed front side marker positions, spanning model years 1972-1983.
The 194 bulb is also specified for all listed rear side marker positions on the Ford E-100, covering model years 1973-1980.
The 194 is a miniature wedge-type bulb, classified under the T10 form factor, which refers to its tubular shape with a width of 10 eighths of an inch.
The 194 operates at 12 volts with a power draw of 3.78 watts, placing it in the low-wattage range typical of marker and courtesy lighting applications.
The 194 conforms to ANSI standards and is recognized in both the United States and Canada, reflecting a standardized specification shared across North American automotive markets.
The wedge base design of the 194 means the bulb is held in its socket by the tension of the base contacts rather than by a bayonet or screw mechanism, which is a common trait in small marker light applications.
Because the same 194 bulb is specified for both the front and rear side marker positions on the Ford E-100, a single bulb type serves both lighting functions across the applicable model years.