Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Z Case Fuse Array
A high-current Z-case fuse assembly (1) bolted to the outside of the Power Distribution Center (PDC) is used to direct battery power to high current devices. The assembly contains four fuses numbered F01, F03, F04, and F05. The connection at F02 is to attach the battery cable to the fuse array. The Electric Power Steering (EPS) unit, Generator, and a Pulse-Width Modulated (PWM) radiator fan controller all receive battery power through the high current fuses. The high current fuses protect the wiring and devices from damage caused by unplanned over-current conditions. This component is serviced separate from the PDC.
| Z Case Fuse Array | |
|---|---|
| F01 | EPS |
| F02 | Battery Cable to Externally Mounted Z-Case Fuse Array |
| F03 | Auxiliary PDC - Diesel Only |
| F04 | Generator (180 or 160 amperes) |
| F05 | PWM Radiator Fan Controller. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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