2007 Peterbilt 387 Fuse Box Diagram (2024)

FAQs

Where is the fuse layout? ›

The main fuse box is typically located under the hood, while secondary fuse panels might be inside the car, often near the dashboard or steering wheel. The fuse's wire conductor breaks when the current exceeds the ampere limit, which manufacturers usually define along with different color codes on each fuse.

A fuse box is a metal box containing screw-in fuses and cartridge fuses. Smaller than the electrical service panels found in most homes today, fuse boxes contain between six and 12 fuses. Most older fuse boxes are rated at 60-amp total capacity.

Most vehicles have two fuse boxes, with one under the hood and the other in the cabin. You can usually find the other fuse box in the dashboard on the driver's side, but some manufacturers also place it below the glove box.

The secondary under-hood fuse box is next to the battery. To open it, push the tabs as shown. If something electrical in your vehicle stops working, check for a blown fuse first. Determine from the chart on pages and , or the diagram on the fuse box lid, which fuse or fuses control that device.

Engine fuse boxes are typically situated near the battery. In this vehicle, the battery is on the driver's side, and there is a fuse box right above it with a black plastic cover to protect the fuses. On the passenger side, there is also a battery, and the fuse box is located nearby.

Locate the instrument cluster fuse.

This is typically found inside the fuse box, which is located under the dash on the driver's side of the car.

Generally the manufacturer's brand name and the actual part number should be enough to identify the right fuse. Unfortunately, this information is not always provided on the fuse, so this guide will help you to interpret the information that you might find on the fuse.

A switched fuse is one that only has power when the ignition is turned on, while a constant fuse always has power.

Unlike a circuit breaker, a blown fuse can't be switched back on. To fix it, you will need to replace the fuse with one of the same amperage rating (more on this below).

The vehicle's fuses are located in two fuse boxes. The interior fuse box is underneath the steering column. The under-hood fuse box is in the engine compartment next to the battery. If something electrical in your vehicle stops working, the first thing you should check for is a blown fuse.

How many fuse boxes does a truck have? ›

There are two fuse boxes, one located near the engine or under the hood and the other is located near the driver seat. Cars have various electrical components that require a fuse to protect against short circuits.

In many homes, especially older ones, the fuse box is often located in the basem*nt, under the stairs or a utility room. It might be mounted on a wall or placed on a freestanding panel.

The best place to install a fuse in a grounded power system is on the ungrounded conductor path to the load. That way, when the fuse blows there will only be the grounded (safe) conductor still connected to the load, making it safer for people to be around.