Ford F-100 Courtesy Bulb Size
The Ford F-100 courtesy light utilizes specific bulb sizes 912, 1445, 631, 1004, and 1003 depending on the specific application. Provided information covers a span from 1956 through 1983 for the listed components.
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 |
|---|---|
| 1981-1983 | 912 |
| 1980 | 1445 |
| 1969-1972 | 631 |
| 1964-1968 | 1004 |
| 1956 | 1003 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Wedge bulb (T15). Variant of 921. 12V, 12W. | 912 |
| ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 2W. | 1445 |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 21W. | 631 |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W. | 1004 |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1003 |