Peterbilt 377 Courtesy Bulb Size
The Peterbilt 377 courtesy light utilizes unique bulb sizes 1004, 1141, 906, and P21W to provide illumination for the interior cabin area of the heavy duty truck. Available data for the specified lighting components spans a range from 1987 through 1997 to assist with identifying the correct replacement for the vehicle.
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
If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.
| Years | US Type | EU Type | Shop |
|---|---|---|---|
| 1997 | 1156 | P21W | Check Price |
| 1004 (With 4 Round Headlamps) | 1004 | Check Price | |
| 1996 | 1141 | 1141 | Check Price |
| 1995 | 1004 | 1004 | Check Price |
| 1141 (With Halogen Capsule Headlamps) | 1141 | Check Price | |
| 1994 | 1141 (With 4 Rectangular Headlamps) | 1141 | Check Price |
| 906 (With 4 Round Headlamps) | 906 | Check Price | |
| 1156 (With Halogen Capsule Headlamps) | P21W | Check Price | |
| 1993 | 1141 | 1141 | Check Price |
| 1004 (With 4 Round Headlamps) | 1004 | Check Price | |
| 1992 | 1156 | P21W | Check Price |
| 906 (With 4 Round Headlamps) | 906 | Check Price | |
| 1991 | 1004 | 1004 | Check Price |
| 1141 (With 4 Rectangular Headlamps) | 1141 | Check Price | |
| 1990 | 1004 | 1004 | Check Price |
| 1141 (With 4 Round Headlamps) | 1141 | Check Price | |
| 1989 | 1141 | 1141 | Check Price |
| 1988 | 1004 | 1004 | Check Price |
| 1141 (With 4 Round Headlamps) | 1141 | Check Price | |
| 1987 | 1141 | 1141 | Check Price |
| 1004 (With 4 Round Headlamps) | 1004 | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W. | P21W | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1156 | Check Price |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W. | 1004 | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1141 | Check Price |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 8W. | 906 | Check Price |