2001 Peterbilt 379 Fuse Panel Diagram (2024)

FAQs

What are the main fuses in fuse box? ›

Your fuse box will have two sets of fuses. At the bottom will be 15-amp and 20-amp screw-in fuses with glass faces that are exposed and visible. These fuses will service branch light circuits and outlet circuits. At the top will be 30-amp or 40-amp cartridge main fuses for ovens, laundry rooms, or stoves.

Usually, you will find two fuse boxes in the car. One is located under the hood and the other is found in the dashboard or near the steering wheel.

Locate the main fuse panel behind the passenger-side dash cover. orange plastic locking mechanism.

Small fuses generally identify the element speed using markings such as F, M, T etc, whilst larger fuses identify the element speed using markings such as gL, gG, aM etc. Some fuses use terms such as slow acting, fast acting, motor rated etc.

The main relay acts like most other relays, but it specifically connects and controls the fuel system and the PCM. The relay turns on and activates both these systems when you turn your key in the ignition.

The fuse and realy are both in the same spot on this truck. If you open the door of the driver side, while standing on the step, look at the driver's foot area. There is a panel that you access. Behind that panel is the fuse box and relays.

Look for the glass containers that hold the fuses. Inspect these containers thoroughly, checking for visible signs of damage. If it looks broken or cracked, it is likely blown. Additionally, some blown fuses have metallic residue running throughout the glass container.

The first thing to do is find your main fuse box (these days called a consumer unit), which will be in the same place as your electricity meter. They're often in the main hallway of a house, in a purpose-built cupboard.

Fuse boxes are typically located in your home's basem*nt, garage, or utility room. If you have an older home, you may have a fuse box instead of a circuit breaker. Fuse boxes are not as common as they once were, but they can still be found in some homes.

The fuse breaks the circuit if a fault in an appliance causes too much current to flow. This protects the wiring and the appliance if something goes wrong. The fuse contains a piece of wire that melts easily. If the current going through the fuse is too great, the wire heats up until it melts and breaks the circuit.

What does main mean in fuse box? ›

A) Main Switch – this allows you to turn off the electricity supply to your home. You might have more than one mains switch, for example if your home has electric storage heaters. In this case you may have a separate fusebox.

A blown fuse can trigger a circuit breaker, which will knock out the power to a section of your home. Getting to the bottom of the problem will help you get the power back on as soon as possible.