Peterbilt 378 Brake Bulb Size
The Peterbilt 378 brake component utilizes 2057 and 198 bulb sizes for illumination across various configurations. Available information spans a range from 1988 through 2007 for the specified vehicle 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 |
|---|---|
| 1997-2007 | 2057 |
| 1996 | 198 |
| 2057 (With 4 Rectangular Headlamps) | |
| 1995 | 2057 |
| 198 (With Halogen Capsule Headlamps) | |
| 1994 | 2057 |
| 1993 | 2057 |
| 198 (With 4 Rectangular Headlamps) | |
| 1992 | 198 |
| 2057 (With Halogen Capsule Headlamps) | |
| 1991 | 2057 |
| 198 (With Halogen Capsule Headlamps) | |
| 1990 | 2057 |
| 198 (With 4 Round Headlamps) | |
| 1989 | 2057 |
| 198 (With 4 Rectangular Headlamps) | |
| 1988 | 2057 |
| 198 (With Halogen Capsule Headlamps) |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Brighter variant of 1157. 12V, 26.9W/8W. | 2057 |
| ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 2W. | 198 |