Sealed-Beam & Bulb Cross-Reference
Standard sealed-beam headlamp trade numbers and the most common automotive bulb trade numbers used through the classic era.
Common Bulb Trade Numbers
| Trade No. | Base / Type | Typical Use |
|---|---|---|
| 1157 | BAY15d, dual-filament | Stop/tail, park/turn |
| 1156 | BA15s, single-filament | Turn signal, back-up |
| 1141 | BA15s, single-filament | Interior, marker, dome |
| 194 / 168 | Wedge | Instrument cluster, side marker |