A fuel pump that fails to deliver the necessary pressure may be experiencing a wiring issue. On a standard fuel pump, 12 volts are needed to work well. When you have the ignition turned on, if you check it using a multimeter, it should show 12 to 14 volts. Realistic answers lower than this indicates a wiring problem, causing the pump performance to decrease about 10-20%, and without fixing it might result in its death soon.
Corrosion can be a significant problem on automotive wiring harnesses, particularly those that are decades old. This in turn will increase electrical resistance (and voltage drops) due to corrosion. A recall for this could be postponed until years later, as it was in 2017 when more than fifty-thousand vehicles were recalled for the intermittent fuel pump failure owing to faulty wiring connections. Corrosion at connectors and ground points can affect the performance of out-of-tank fuel pumps.
As Thomas Edison wrote, "The three great essentials to achieve anything worthwhile are: Hard work, Stick-to-itiveness, and Common sense. The first point: start troubleshooting with the basics. Slap up all connections but give a special look with your eyes to the grounding wire. If the ground connection is not good enough, up to 70% of the voltage that should be sent to the pump never even makes it, and that will cause misfires or stalling of your engine.
Is a Blown Fuse Causing Fuel Pump Wiring Problems Fuses Fuses are constructed to protect the pump electrical circuit. A fuel pump usually is used with a 15- to 20-amp fuse REPEATED BLOWING: A blown fuse may be due to a short in the wiring or have an overloaded circuit that could damage the pump. If we only replace the fuse, and don't fix the root cause then the fuel system will be further damaged.
GAGESThe gage of the wire is critical to pumpperformance. And remember, most fuel pumps will ask for 10 or 12 AWG wiring so it can support the current. The use of a wire gauge that is too small will cause overheating as well as result in 30% electrical efficiency loss, the consequence being a substantial reduction of life expectancy of the pump. In a real-world example, one fleet company had multiple instances of fuel pump failure because the wiring was undersized – meaning they paid thousands every time just to fix this issue.
If you want to avoid such problems, always only trust Fuel Pump working great when it comes to parts and installation instructions. Correct fuel pump wiring troubleshooting will keep your vehicle on the road and not leave you stranded.