Freightliner Business Class M2 Fuse Box Diagram
The main fuse box, also known as the power distribution module, or PDM, is located under the hood onthe left front fender just forward of the bulkhead module.
The fuses in the main fuse box are mini blade-type fuses. Battery power fuses, located near the batteries, are bolt-in megafuses.
Because the electrical system is multiplexed, no relays are needed. The multiplexing module performs the functions normally provided by relays.
The trailer fuse box and the taillight fuse box, on vehicles so equipped, are mounted on a bracket with the chassis module on the left-hand frame rail aft of the cab, or on a crossmember at the end of the frame rail. These may be referred to as the chassis fuse box or chassis PDM.
The fuses in the main fuse box are mini blade-type fuses. Battery power fuses, located near the batteries, are bolt-in megafuses.
Because the electrical system is multiplexed, no relays are needed. The multiplexing module performs the functions normally provided by relays.
Main Fuse Box
1. Bulkhead Module
2. Main Fuse Box
| No. | Fused function | A |
| F1 | VCU (MBE900 only) | 10 |
| F2 | Blower Motor | 30 |
| F3 | Engine ECU | 20 |
| F4 | Transmission Control Unit | 30 |
| F5 | Ignition Switch | 5 |
| F6 | Spare | — |
| F7 | Bulkhead Module | 30 |
| F8 | ICU | 10 |
| F9 | Transmission Control Unit | 20 |
| F10 | Door Locks (optional) | 10 |
| F11 | Mirrors (optional) | 15 |
| F12 | Radio/Diagnostics | 20 |
| F13 | Chassis Module | 30 |
| F14 | L7H Power Windows (optional) | 15 |
| F15 | Bulkhead Module | 30 |
| F16 | ABS ECU | 15 |
| F17 | Chassis Module | 30 |
| F18 | Bulkhead Module | 30 |
| F19 | Chassis Module | 30 |
| F20 | Bulkhead Module | 30 |
| F21 | R/H Power Windows (optional) | 15 |
| F22 | Bulkhead Module | 30 |
| F23 | Spare | — |
| F24 | Spare | — |
| F25 | Spare | — |
| F26 | Spare | — |
| M1 | Battery Power | 125 |
| M2 | Battery Power | 125 |
| M3 | Battery Power | 150 |
Trailer Fuse Box
Taillight Fuse Box
