Are you having trouble with your 2009 F150 fuse box? One of the most common issues with this type of truck is the electrical system. The fuse box is a vital component of the electrical system that controls various functions of your vehicle. If you are experiencing problems with your truck, it's essential to understand the fuse box's layout and how it works. In this article, we will provide you with a comprehensive guide on the 2009 F150 fuse box diagram.
What is a Fuse Box?
The fuse box is a component of the electrical system that protects your vehicle's circuits from damage. It contains various fuses and relays that control the electrical system's functions, such as the air conditioning, headlights, and windshield wipers. Each fuse is designed to protect a specific circuit in your vehicle, and when a circuit overloads, the fuse will blow, preventing damage to the electrical system.
The 2009 F150 fuse box is located under the hood on the driver's side of the engine compartment. It contains various fuses and relays that control the engine's functions, such as the fuel pump, ignition, and transmission. The fuse box's layout is essential in understanding which fuse controls which circuit in your vehicle.
Understanding the Fuse Box Layout
The 2009 F150 fuse box layout is divided into three sections: the battery junction box, the central junction box, and the auxiliary relay box. The battery junction box is located under the hood on the driver's side of the engine compartment, while the central junction box is located inside the passenger compartment under the driver's side of the dashboard. The auxiliary relay box is located on the driver's side of the engine compartment near the battery.
Battery Junction Box
The battery junction box contains the high current fuses and relays needed to control the engine's functions. These fuses and relays include the fuel pump relay, the starter relay, and the PCM power relay. The battery junction box's layout is as follows:
- Fuse 1: Trailer tow backup lamps
- Fuse 2: Brake pedal position switch
- Fuse 3: Not used
- Fuse 4: Trailer tow park lamps
- Fuse 5: Not used
- Fuse 6: Trailer tow stop lamps
- Fuse 7: Not used
- Fuse 8: Trailer tow left turn/stop lamps
- Fuse 9: Not used
- Fuse 10: Trailer tow right turn/stop lamps
- Fuse 11: Not used
- Fuse 12: Run/Start relay
- Fuse 13: Starter relay
- Fuse 14: Not used
- Fuse 15: PCM power relay
- Fuse 16: Not used
- Fuse 17: Not used
- Fuse 18: Fuel pump relay
Central Junction Box
The central junction box contains the lower current fuses and relays needed to control the electrical system's functions. These fuses and relays include the air conditioning relay, the windshield wiper relay, and the turn signal/hazard flasher relay. The central junction box's layout is as follows:
- Fuse 1: Trailer tow battery charge relay
- Fuse 2: Not used
- Fuse 3: Not used
- Fuse 4: Trailer tow left turn/stop lamps
- Fuse 5: Trailer tow right turn/stop lamps
- Fuse 6: Not used
- Fuse 7: Not used
- Fuse 8: Not used
- Fuse 9: Not used
- Fuse 10: Not used
- Fuse 11: Not used
- Fuse 12: Not used
- Fuse 13: Powertrain control module
- Fuse 14: Not used
- Fuse 15: Not used
- Fuse 16: Not used
- Fuse 17: Not used
- Fuse 18: Not used
- Fuse 19: Not used
- Fuse 20: Not used
- Fuse 21: Not used
- Fuse 22: Not used
- Fuse 23: Not used
- Fuse 24: Not used
- Fuse 25: Not used
- Fuse 26: Powertrain control module
- Fuse 27: Not used
- Fuse 28: Not used
- Fuse 29: Not used
- Fuse 30: Not used
- Fuse 31: Not used
- Fuse 32: Not used
- Fuse 33: Not used
- Fuse 34: Not used
- Fuse 35: Not used
- Fuse 36: Not used
- Fuse 37: Not used
- Fuse 38: Not used
- Fuse 39: Not used
- Fuse 40: Not used
- Fuse 41: Not used
- Fuse 42: Not used
- Fuse 43: Not used
- Fuse 44: Not used
- Fuse 45: Not used
- Fuse 46: Not used
- Fuse 47: Not used
- Fuse 48: Not used
- Fuse 49: Not used
- Fuse 50: Not used
- Fuse 51: Not used
- Fuse 52: Not used
- Fuse 53: Not used
- Fuse 54: Not used
- Fuse 55: Not used
- Fuse 56: Not used
- Fuse 57: Not used
- Fuse 58: Not used
- Fuse 59: Not used
- Fuse 60: Not used
- Fuse 61: Not used
- Fuse 62: Not used
- Fuse 63: Not used
- Fuse 64: Not used
- Fuse 65: Not used
- Fuse 66: Not used
- Fuse 67: Not used
- Fuse 68: Not used
- Fuse 69: Not used
- Fuse 70: Not used
- Fuse 71: Not used
- Fuse 72: Not used
- Fuse 73: Not used
- Fuse 74: Not used
- Fuse 75: Not used
- Fuse 76: Not used
- Fuse 77: Not used
- Fuse 78: Not used
- Fuse 79: Not used
- Fuse 80: Not used
Auxiliary Relay Box
The auxiliary relay box contains the fuses and relays needed to control the electrical system's functions. These fuses and relays include the air conditioning clutch relay, the blower motor relay, and the powertrain control module relay. The auxiliary relay box's layout is as follows:
- Fuse 1: Not used
- Fuse 2: Trailer tow battery charge relay
- Fuse 3: Not used
- Fuse 4: Blower motor relay
- Fuse 5: Not used
- Fuse 6: Powertrain control module relay
- Fuse 7: Not used
- Fuse 8: Not used
- Fuse 9: Not used
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