Infiniti G37 Fuse Box Diagram

Understanding your Infiniti G37’s fuse box is crucial for maintaining your vehicle and troubleshooting electrical issues. Fuses are safety devices designed to protect your car's electrical system from overloads. When a fuse blows, it interrupts the electrical circuit, preventing damage to other components. This article provides a comprehensive guide to the Infiniti G37 fuse box diagram, locations, and how to identify and replace fuses.

Infiniti G37 Fuse Box Locations

The Infiniti G37 typically has three fuse box locations:

Interior Fuse Box (Driver's Side): Located under the dashboard on the driver's side. This fuse box generally controls interior electrical components such as the radio, power windows, and interior lights.
Interior Fuse Box (Passenger's Side): Also located inside the cabin, usually behind the glove compartment. This box may house fuses related to the entertainment system, climate control, and other comfort features. Accessing it may require removing the glove box.
Engine Compartment Fuse Box: Situated in the engine bay, usually near the battery. This fuse box protects vital engine components and systems like the engine control unit (ECU), fuel pump, and ignition system.

Consulting your owner's manual is the most reliable way to pinpoint the precise location of each fuse box in your specific G37 model year, as slight variations might exist.

Understanding the Fuse Box Diagram

Each fuse box has a corresponding diagram, typically located on the inside of the fuse box cover. This diagram is essential for identifying which fuse corresponds to which electrical component. The diagram uses symbols or abbreviations to represent each circuit. Here's a breakdown of how to decipher it:

Fuse Number: Each fuse slot is numbered, allowing you to quickly locate it on the diagram.
Circuit Description: This tells you what the fuse protects, for example, "Radio," "Headlights," or "Power Windows."
Amperage Rating: This indicates the maximum current (measured in amps) that the fuse can handle before blowing. Common amperage ratings include 5A, 7.5A, 10A, 15A, 20A, 25A, 30A, and so on. It is crucial to replace a blown fuse with one of the same amperage rating. Using a fuse with a higher amperage rating can overload the circuit and cause serious damage.
Symbol/Abbreviation: Diagrams often use symbols or abbreviations to save space. Refer to the legend (usually on the same diagram) to understand what each symbol means.

Example: Let's say the diagram shows "Fuse #10: Radio (15A)." This means that fuse number 10 protects the radio circuit and has a 15-ampere rating. If your radio stops working, you would check fuse number 10 to see if it's blown.

Common Fuses and Their Functions

Here's a list of some common fuses found in the Infiniti G37 and their typical functions:

ECU (Engine Control Unit): Controls the engine's operation.
ABS (Anti-lock Braking System): Manages the anti-lock braking system.
Fuel Pump: Powers the fuel pump, which delivers fuel to the engine.
Headlights/Taillights: Powers the headlights and taillights.
Turn Signals: Powers the turn signals.
Power Windows: Controls the power windows.
Power Locks: Controls the power door locks.
Radio/Audio System: Powers the radio and audio system.
Climate Control/AC: Controls the air conditioning and heating system.
Cigarette Lighter/Power Outlet: Powers the cigarette lighter or auxiliary power outlet.

How to Check and Replace a Fuse

Before checking or replacing any fuses, always turn off the ignition and remove the key from the ignition switch. This will prevent accidental electrical shocks or damage to the electrical system.

Locate the Correct Fuse Box: Use your owner's manual to find the fuse box associated with the component that is not working.
Remove the Fuse Box Cover: The cover usually has clips or tabs that can be easily released.
Identify the Suspect Fuse: Use the fuse box diagram to locate the fuse that corresponds to the malfunctioning component.
Inspect the Fuse: Look at the fuse element (the thin wire inside the fuse). If the element is broken or melted, the fuse is blown and needs to be replaced. Sometimes, it can be difficult to see if a fuse is blown just by looking at it.
Use a Fuse Tester (Recommended): A fuse tester is a small, inexpensive tool that can quickly and accurately determine if a fuse is blown. Simply touch the tester to the test points on the top of the fuse. If the tester lights up, the fuse is good. If it doesn't light up, the fuse is blown.
Remove the Blown Fuse: Use a fuse puller (usually located inside the fuse box) to remove the blown fuse. If you don't have a fuse puller, you can use a pair of small pliers, but be careful not to damage the surrounding fuses or the fuse box.
Replace the Fuse: Install a new fuse with the same amperage rating as the blown fuse. Push the new fuse firmly into the slot.
Test the Component: Turn the ignition on and test the component that was not working to see if the new fuse has resolved the issue.
Replace the Fuse Box Cover: Snap the fuse box cover back into place.

What to Do If a Fuse Blows Repeatedly

If a fuse blows repeatedly, it indicates a problem in the circuit. Do not simply replace the fuse with a higher amperage rating, as this can cause serious damage. Instead, you should:

Check for Short Circuits: Inspect the wiring and components associated with the circuit for any signs of damage, such as frayed wires, loose connections, or corrosion.
Consult a Qualified Mechanic: If you are unable to identify the cause of the short circuit, take your car to a qualified mechanic for diagnosis and repair.

Troubleshooting Common Electrical Problems with Fuses

Here are some common electrical problems and the fuses that might be involved:

Radio Not Working: Check the "Radio" fuse in the interior fuse box.
Headlights Not Working: Check the "Headlights" fuse in the engine compartment fuse box. Also check the fuses for left and right headlights individually.
Power Windows Not Working: Check the "Power Windows" fuse in the interior fuse box.
Cigarette Lighter Not Working: Check the "Cigarette Lighter" fuse in the interior fuse box.
Engine Not Starting: Check the "ECU" and "Fuel Pump" fuses in the engine compartment fuse box.

Finding Replacement Fuses

Replacement fuses can be purchased at most auto parts stores. Be sure to purchase fuses with the correct amperage rating. It's a good idea to keep a spare set of fuses in your car in case of an emergency.

Disclaimer

This article is for informational purposes only and should not be considered a substitute for professional advice. Always consult your Infiniti G37's owner's manual for specific information about your vehicle. If you are not comfortable working on your car's electrical system, take it to a qualified mechanic.