Subaru GL-10 front and rear side marker bulbs use a 194 size bulb for illumination. The replacement chart covers 1985 to 1989 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 Subaru GL-10 uses the 194 bulb for both front and rear side marker positions across the 1985-1989 model years.
The 194 is a miniature wedge-type bulb, classified under the T10 form factor, which refers to its tubular shape with a wedge base that requires no separate socket pins.
This bulb 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 it conforms to a defined set of electrical and physical criteria shared across compliant manufacturers.
Because the front and rear side marker positions on the GL-10 share the same bulb size, a single bulb type services all four side marker sockets on the vehicle.
The T10 wedge base is a widely produced form factor, and the 194 designation is interchangeable with several other ANSI-coded bulbs that share the same base type and electrical ratings, though substitutions should be confirmed against voltage and wattage tolerances.