Question

A technician is performing a voltage drop on a fuel pump that does operate. When performing the voltage drop test on the Fuel Pump Power Wire the meter displays 12.5V before the fuel pump is turned on. What does this indicate?

1) There is continuity through the fuel pump to ground
2) The fuel pump is good
3) An excessive voltage drop on the power wire
4) An excessive voltage drop on the ground wire

Answer 1

A voltage reading of 12.5V before the fuel pump is turned on indicates an excessive voltage drop on the power wire, typically caused by resistance in the wire.

Step-by-step explanation:

When performing a voltage drop test on the Fuel Pump Power Wire, a reading of 12.5V before the fuel pump is turned on indicates an excessive voltage drop on the power wire. This means that there is resistance in the wire, causing a drop in voltage as current flows through it. The excessive voltage drop can be caused by issues such as loose connections, corroded wires, or a high resistance in the wire.