Jonathan Yarden Mar 25, 2021 · 5 min. read
In this article you will find a description of fuses and relays Freightliner,
with photos of block diagrams and their locations.
Highlighted the cigarette lighter fuse (as the most popular thing people look for).
Get tips on blown fuses, replacing a fuse, and more.
Main Fuse Box
The main fuse box, also known as the Power Distribution Module, or PDM, is located under the hood on the left front fender just ahead of the bulkhead module.
The fuses in the main fuse box are paddle type mini fuses. The battery power fuses located next to the batteries are screw-in mega fuses.
Because the electrical system is multiplexed, no relays are needed. The multiplexing module performs the functions that relays normally perform.
| Number | Function | Ampere ratting [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
The trailer fuse box and tail light fuse box on so equipped vehicles are mounted on a bracket with the chassis module on the left frame beam aft of the cab or on a cross member at the end of the frame beam. They may be called chassis fuse box or chassis module PDM.
Taillight Fuse Box
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