Mack RL Headlight Bulb Size
The Mack RL headlight bulb size specifications include high beam options of H6024, H4651, and H5001, along with low beam alternatives of H6024, H4652, and H5006 in various sizes. A replacement chart documents bulb specifications across the 1981 to 1987 production years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
High Beam Headlight
| Years | Bulb Type | Shop |
|---|---|---|
| 1981-1987 | H6024 (With 2 Round Headlamps) | Check Price |
| H4651 (With 4 Rectangular Headlamps) | Check Price | |
| H5001 (With 4 Round Headlamps) | Check Price |
Low Beam Headlight
| Years | Bulb Type | Shop |
|---|---|---|
| 1987 | H6024 (With 2 Round Headlamps) | Check Price |
| H4652 (With 4 Rectangular Headlamps) | Check Price | |
| H5006 (With 4 Round Headlamps) | Check Price | |
| 1985-1986 | H6024 (With 2 Round Headlamps) | Check Price |
| H4656 (With 4 Rectangular Headlamps) | Check Price | |
| H5006 (With 4 Round Headlamps) | Check Price | |
| 1984 | H6024 (With 2 Round Headlamps) | Check Price |
| H4652 (With 4 Rectangular Headlamps) | Check Price | |
| H5006 (With 4 Round Headlamps) | Check Price | |
| 1982-1983 | H6024 (With 2 Round Headlamps) | Check Price |
| H4656 (With 4 Rectangular Headlamps) | Check Price | |
| H5006 (With 4 Round Headlamps) | Check Price | |
| 1981 | H6024 (With 2 Round Headlamps) | Check Price |
| H4652 (With 4 Rectangular Headlamps) | Check Price | |
| H5006 (With 4 Round Headlamps) | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). 7-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V. | H6024 | Check Price |
| ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V. | H4651 | Check Price |
| ANSI standard (US & Canada). 4-inch square sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V. | H5001 | Check Price |
| ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit, variant of H4651. Not a replaceable bulb — the entire unit is replaced. 12V. | H4652 | Check Price |
| ANSI standard (US & Canada). 5.75-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V. | H5006 | Check Price |
| ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V. | H4656 | Check Price |