Peterbilt 320 Courtesy Bulb Size
The Peterbilt 320 courtesy light utilizes 1141, 906, P21W, and 1004 bulb sizes for the interior lighting system. Available information for the specified vehicle covers the range from 1987 to 1997.
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 | 1141 (With 4 Rectangular Headlamps) |
| 906 (With 4 Round Headlamps) | |
| P21W (With Halogen Capsule Headlamps) | |
| 1996 | 1004 |
| 1141 (With Halogen Capsule Headlamps) | |
| 1995 | 1141 |
| P21W (With 4 Rectangular Headlamps) | |
| 1994 | 1141 (With 4 Rectangular Headlamps) |
| 906 (With 4 Round Headlamps) | |
| 1004 (With Halogen Capsule Headlamps) | |
| 1993 | 1141 |
| P21W (With Halogen Capsule Headlamps) | |
| 1991-1992 | 1004 |
| 1141 (With 4 Round Headlamps) | |
| 1990 | 1004 (With 4 Rectangular Headlamps) |
| 1141 (With 4 Round Headlamps) | |
| P21W (With Halogen Capsule Headlamps) | |
| 1988-1989 | 1141 |
| 1987 | 1141 (With 4 Rectangular Headlamps) |
| 1004 (With 4 Round Headlamps) | |
| P21W (With Halogen Capsule Headlamps) |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1141 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 8W. | 906 |
| ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W. | P21W |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W. | 1004 |