Where is the fuel pump relay of BYD F3 located?
3 Answers
BYD F3 fuel pump relay is located on the wiring harness assembly. The wiring harness assembly is positioned under the steering wheel, with a small storage compartment on the left side. Behind this storage compartment, the wiring harness assembly sequentially contains the fuel pump relay, window relay, vacant slot, rear defroster relay, ignition relay, and flasher relay mounting bracket. A relay is an automatic switch that uses a smaller current to control a larger one, functioning as an electronic control device with both control and controlled systems. It is commonly used in automatic control circuits to perform roles such as automatic regulation, safety protection, and circuit switching. The BYD F3 series is equipped with a 1.5L inline 4-cylinder naturally aspirated engine, paired with either a 5-speed manual or 6-speed dual-clutch transmission, delivering a maximum power of 80KW and a maximum torque of 145NM.
I've been driving my BYD F3 for over a decade, so I remember the fuel pump relay location clearly. It's usually in the left side of the engine compartment, inside that fuse box. Pop the hood, and you'll see a black rectangular plastic box. Open its cover to find it packed with fuses and relays, each labeled accordingly. Look for markings saying 'Fuel Pump' or '燃料ポンプ' – that's generally the one. The position is fixed, but always ensure the vehicle is completely turned off with the key removed before working to avoid any electric shock risks. If you can't find the label, don't panic. In most cases, newer models relocate it under the dashboard, but the F3 typically keeps it here. Remember to use plastic tools or wear gloves during inspection – never touch directly with hands or metal objects to prevent short circuits. Last month, my car wouldn't start, and it turned out to be this issue; replacing the relay fixed it immediately. I recommend checking these components during routine maintenance to prevent major problems.
The fuel pump relay plays a crucial role in the circuit by controlling the fuel supply from the pump. In the BYD F3, it is commonly located inside the engine compartment fuse box. After opening the hood, look towards the front left side—the box is prominent and easy to spot. Opening its cover reveals multiple relays neatly arranged. Locate it by checking labels, such as a small square marked 'Fuel Pump.' If not clearly labeled, refer to the owner's manual or fuse box diagram for detailed positioning. Relay failures often stem from oxidized contacts or damaged coils, leading to fuel pump failure and difficulty starting the vehicle. When replacing, ensure the relay matches OEM specifications and that wiring is secure. Regular cleaning of the box and contacts during routine maintenance can extend its lifespan. If uncertain about the location or lacking hands-on experience, visit a professional repair shop for technician assistance—they provide faster and more accurate diagnostics.
