Are you having trouble with your Jeep Grand Cherokee’s electrical system? One of the first things you need to check is the fuse box. The fuse box diagram provides a map of all the fuses and their functions. In this article, we will discuss everything you need to know about the Grand Cherokee fuse box diagram.
What is a Fuse Box?
A fuse box is a component that houses electrical fuses. Fuses are small devices that protect electrical circuits from overcurrent. When a circuit experiences a surge in current, the fuse will melt and break the circuit, preventing further damage.
Your Jeep Grand Cherokee has two fuse boxes: the Power Distribution Center (PDC) and the Junction Block. The PDC is located in the engine compartment, while the Junction Block is located inside the vehicle, on the passenger side end of the instrument panel.
Grand Cherokee Fuse Box Diagram
Here is the fuse box diagram for the 2021 Jeep Grand Cherokee:
| Fuse Number | Function |
| F101 | Ignition Off Draw (IOD) |
| F102 | Battery |
| F103 | Occupant Restraint Controller (ORC) |
| F104 | Rear Axle Lock |
| F105 | Transmission Control Module (TCM) Power |
| F106 | Occupant Classification Module (OCM) |
| F107 | Heated Steering Wheel |
| F108 | Trailer Tow |
Function of Each Fuse
Here is a brief description of the function of each fuse in the 2021 Jeep Grand Cherokee:
F101: Ignition Off Draw (IOD)
The IOD fuse provides continuous battery power to various systems even when the ignition switch is turned off. This includes the radio, power seats, power windows, and other accessories.
F102: Battery
The Battery fuse provides power to the PDC and the Junction Block. It is a 50-amp maxi fuse.
F103: Occupant Restraint Controller (ORC)
The ORC fuse provides power to the airbag system and other safety systems. It is a 20-amp yellow mini blade fuse.
F104: Rear Axle Lock
The Rear Axle Lock fuse provides power to the rear axle lock system. It is a 10-amp red mini blade fuse.
F105: Transmission Control Module (TCM) Power
The TCM Power fuse provides power to the transmission control module. It is a 10-amp red mini blade fuse.
F106: Occupant Classification Module (OCM)
The OCM fuse provides power to the occupant classification module. It is a 10-amp red mini blade fuse.
F107: Heated Steering Wheel
The Heated Steering Wheel fuse provides power to the heated steering wheel system. It is a 10-amp red mini blade fuse.
F108: Trailer Tow
The Trailer Tow fuse provides power to the trailer tow module. It is a 30-amp green mini blade fuse.
FAQ
1. How do I know if a fuse is blown?
A blown fuse will have a broken wire inside the fuse. You can also use a multimeter to check if the fuse is conducting electricity. If the multimeter reads 0 volts, then the fuse is blown.
2. Can I replace a fuse with a higher amp fuse?
No, you should never replace a fuse with a higher amp fuse. This can cause electrical damage or even a fire. Always replace a fuse with the same amp rating as the original.
3. How do I access the fuse box in my Jeep Grand Cherokee?
The PDC is located in the engine compartment, while the Junction Block is located inside the vehicle, on the passenger side end of the instrument panel. Refer to your owner’s manual for the exact location and access instructions.
4. What should I do if a fuse keeps blowing?
If a fuse keeps blowing, there may be an underlying problem with the electrical system. It’s best to have a certified mechanic diagnose and repair the issue.
5. Can I drive my Jeep Grand Cherokee if a fuse is blown?
It depends on which fuse is blown and what system it controls. If the blown fuse controls a non-essential system like the radio, then you can still drive your vehicle. However, if the blown fuse controls an essential system like the brakes or headlights, then you should not drive your vehicle until the fuse is replaced.
Now that you know everything about the Grand Cherokee fuse box diagram, you can troubleshoot and fix any electrical issues with your Jeep. Remember to always use the correct amp rating when replacing fuses.
