Ford F-250 High Beam Indicator Bulb Size

Additional Notes

• The Ford F-250 high beam indicator bulb specifications cover model years 1969 through 1999, with three distinct bulb types used across that span: the 1895, the 194, and the PC74.
• The 194 bulb is the most widely used type in these specifications, fitted to the Ford F-250 from 1973 through 1998, a span of 26 model years.
• The 194 is an ANSI-standard miniature wedge bulb of the T10 type, rated at 12V and 3.78W, making it the highest wattage of the three bulb types listed in these specifications.
• The 1895 bulb was used in the 1969-1971 Ford F-250, and shares the T5 miniature wedge form factor with the PC74, though it differs in socket type and wattage.
• The 1895 operates at 12V and 0.9W, the lowest wattage among the three bulb types in these specifications, and carries ANSI standardization for both the US and Canada.
• The PC74 bulb was used exclusively in the 1999 Ford F-250 among the years listed, representing a departure from the 194 that had been fitted for the preceding 26 model years.
• The PC74 is a T5 miniature wedge bulb rated at 12V and 1.4W, distinguished from other T5 types by its printed circuit board twist-lock socket, a design specific to instrument cluster applications.
• Although the 194 and the PC74 are both 12V wedge bulbs, their socket types are not the same. The PC74 uses a printed circuit board twist-lock socket, while the 194 uses a standard wedge base, making the two types non-interchangeable.
• The 1895 and the PC74 share the T5 bulb designation but differ in wattage and socket design, and are not interchangeable despite their physical similarities in size classification.
• All three bulb types in these specifications conform to ANSI standards recognized in both the United States and Canada.