Ford Custom Trunk Bulb Size
The Ford Custom trunk bulb specifications include 3 distinct sizes: 89, 631, and 93, with each bulb size corresponding to particular vehicle configurations. The replacement chart covers Ford Custom production from 1957 through 1972, detailing which bulb size applied to each model year.
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 |
|---|---|
| 1972 | 89 |
| 1968-1971 | 631 |
| 1967 | 93 |
| 1966 | 1156 |
| 1965 | 93 |
| 1964 | 1156 |
| 1957 | 89 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W. | 89 |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 21W. | 631 |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W. | 93 |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1156 |