Ford Ranch Wagon front side marker bulbs utilized 1157, 194, or 161 size configurations, while rear side marker bulbs used 194 or 161 sizes. The replacement chart covers 1968 through 1974 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 Ranch Wagon side marker bulb specifications cover front and rear positions across model years from 1968 to 1974.
The 194 is the most frequently specified bulb across both positions, appearing in the front side marker for 1970 and 1972 and in the rear side marker for 1969, 1970, 1972, 1973, and 1974. It is a T10 miniature wedge bulb rated at 12V and 3.78W.
The 161 is a T10 miniature wedge bulb rated at 12V and 1W. Although it shares the same T10 wedge form factor as the 194, its wattage is significantly lower, which makes the two bulbs non-interchangeable despite their physical similarity.
The 1157 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with filaments drawing 21W and 5W respectively. It is specified for the Ford Ranch Wagon front side marker in 1973.
The 1034NA is a natural amber glass variant of the 1157, sharing the same BAY15d bayonet base and 12V, 21W/5W ratings. It is specified for the Ford Ranch Wagon front side marker in 1968.
Because the 1034NA incorporates amber coloring within the glass itself, it is not a direct substitute for the standard 1157, even though both share the same base type and electrical ratings. The amber tint is integral to the 1034NA rather than produced by a colored lens.
The front side marker position shows variation across model years, with four distinct bulb types specified between 1968 and 1973, indicating that the front marker assembly changed in design or regulatory requirement over that period.
The rear side marker position uses only the 194 and 161 across all listed years, with the 161 appearing exclusively in 1971 and the 194 covering all other listed rear marker years.
All four bulb types listed in the specifications conform to ANSI standards applicable in both the United States and Canada, meaning they follow a standardized numbering and performance classification system.
The shift from the 1034NA in 1968 to the 161 in 1971 and then to the 1157 in 1973 for the front side marker position reflects changes in bulb type, base style, and wattage, which means year-specific fitment must be observed to avoid mismatches.