The Dodge W250 uses the 194 bulb for both front and rear side marker positions across all listed model years.
The 194 is an ANSI-standardized bulb recognized in both the United States and Canada, operating at 12 volts with a power draw of 3.78 watts.
The 194 bulb follows the T10 miniature wedge form factor, a designation that refers to its tubular glass envelope and wedge-style base, which requires no separate metal socket pins.
The front side marker of the Dodge W250 used the 194 bulb across the 1981-1993 model years.
The rear side marker of the Dodge W250 used the 194 bulb across the 1986-1991 model years.
Because the front and rear side marker positions share the same 194 bulb specification, a single bulb type serves both locations on the Dodge W250 for the years in which both positions are listed.
The T10 wedge base is a push-in fitment, meaning the bulb is retained by friction within its socket rather than by a bayonet or screw mechanism.
At 3.78 watts, the 194 is a low-wattage bulb, consistent with its role as a marker lamp rather than a primary illumination source.