Ford F-150 Check Engine Bulb Size

The Ford F-150 check engine light requires a 194 bulb size for the instrument cluster. Data for 194 bulb requirements covers the period from 1994 through 1996.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1994-1996	194

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194

Other Locations

Additional Notes

The 194 bulb is the sole check engine light bulb type listed for the Ford F-150 across the 1994-1996 model years.
The 194 is an ANSI-standardized bulb used in both the United States and Canada, meaning it conforms to a shared North American specification rather than a regional variant.
It operates on a 12-volt electrical system and draws 3.78 watts, placing it in the low-wattage range typical of instrument panel indicator lighting.
The 194 uses a T10 miniature wedge base, a socketless design where the bulb itself is held in place by friction within the housing rather than by a separate socket or locking mechanism.
The T10 wedge form factor is widely shared across many instrument cluster and indicator applications, though fitment into a specific housing depends on the physical space and retention design of that housing.