Mercury LN7 front and rear side marker bulbs utilize a 194 size bulb for both locations. The replacement chart covers 1982 to 1983 vehicle 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 194 bulb is the sole bulb type listed across all side marker positions on the Mercury LN7 for the 1982-1983 model years.
The 194 is classified as a miniature wedge bulb, designated T10 in the international bulb sizing system, where "T" refers to the tubular shape and "10" indicates the width in 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 carries ANSI standardization recognized in both the United States and Canada, meaning the specification conforms to a defined performance and dimensional standard rather than a proprietary one.
The wedge base design of the T10 form factor means the bulb is held in its socket by the glass envelope itself rather than by a separate metal base, which is a common trait of low-current automotive signal and marker bulbs.
The front and rear side marker positions on the Mercury LN7 share the same 194 bulb specification across both listed model years, indicating no positional differentiation in bulb requirements between the front and rear of the vehicle.