: Located next to the battery for primary electrical systems.
| Fuse Position | Amperage (A) | Circuit / Component Protected | | :--- | :--- | :--- | | | 200A (Mega) | Alternator to battery main feed | | F101 | 60A (J-Case) | Hydraulic cooling fan motor (Variable speed) | | F102 | 40A (J-Case) | Glow plug controller (Pre-heat for cold starts) | | F103 | 30A (J-Case) | Starter solenoid (Key crank signal) | | F104 | 30A | Fuel lift pump & fuel system heater (Tier 4) | | F105 | 30A | DEF (Diesel Exhaust Fluid) Dosing control unit | | F106 | 50A | Regen (Regeneration) fan motor & burner (DPF cleaning system) | | F107 | 25A | Engine cooling fan (PWM controlled – if not hydraulic) | | F108 | 10A | Exhaust gas recirculation (EGR) valve actuator | | F109 | 15A | Engine stop solenoid (Fuel shutoff) |
: Located on the right-hand panel, this typically controls accessories like the Quick-Tatch , radio, and blower motor. John Deere 333g Fuse Panel Diagram
Access the storage tray by opening the main hood.
| Fuse/Relay | Rating | Circuit (General Function) | | :--- | :--- | :--- | | F01 | 30A | Key Switch | | F04 | 20A | Light Switch | | F05 | 30A | Head Light | | F06 | 30A | Junction Block - Unswitched Power | | F07 | 20A | Instrument Cluster | | F09 | 20A | Turn Signal | | F12 | 10A | Radio | | F13 | 30A | Rear Worklight | | F14 | 30A | Front Worklight | | F15 | 15A | Tail Light | | F19 | 10A | Transmission Control Unit | | F20 | 10A | Cab Control Unit Sensors | | F23 | 30A | Heating/Cooling & Right Blower | | F24 | 25A | Wiper | | F25 | 20A | Left Blower | | F27 | 5A | Backup Alarm | | F32 | 10A | Electro-Hydraulic Hitch | | F35 | 30A | Backup Alarm Switch, Air Seat, Modular Telematics Gateway | | F5005 | 30A | Engine Control Unit (ECU) Power | | F5006 | 25A | Engine Control Unit (ECU) Power | | F5007 | 25A | Engine Control Unit (ECU) Power | | K07 | Relay | Accessory Power Relay | | K08 | Relay | Rear Worklight Relay | | K09 | Relay | Front Worklight Relay | | K20 | Relay | Heating, Ventilation, and Cooling (HVAC) Relay | | K21 | Relay | Wiper Relay | | K39 | Relay | Brake Light Relay | : Located next to the battery for primary electrical systems
: With the ignition set to "ON," use a voltage tester to probe the top metal tabs of each fuse. If only one side has power, the fuse is blown.
For complex issues like work lights failing despite good fuses, locate the Relay K6 (often located below the fuse box on the operator's right) and swap it with a known good relay of the same type to test. | Fuse/Relay | Rating | Circuit (General Function)
: Often related to the ECM/Engine Control Unit . If this blows, the engine may crank but not power the controller.
| Symptom | Likely Blown Fuse | Root Cause | | :--- | :--- | :--- | | | F13 (10A) | Moisture in the rear light harness; corroded socket. | | Hydraulic fan runs at full speed constantly | F101 (60A) | Failed fan PWM solenoid; short in fan motor wiring. | | Key on, no display, but engine starts | F08 (7.5A) | Loose dash connector. | | Attachment won’t stay connected (pops off) | F10 (30A) | Debris in quick coupler magnet; partial short. | | Frequent F103 (starter) failures | 30A (repeat blow) | Bad starter or pinched wire on starter motor chassis. | | No DEF consumption (emissions light on) | F105 (30A) | DEF pump frozen in winter (improper winter-grade DEF). |
Understanding the is critical for efficient troubleshooting and reducing downtime. This guide covers the fuse panel location, a breakdown of common fuses and relays, and safety tips for troubleshooting. 1. Location of the Fuse and Relay Panel