How to Test a GM Fuel Pump Relay?

Answer Your GM car or truck has a relay to turn the fuel pump on and off. The fuel pump pulls gasoline out of the tank and sends it to the engine. If the relay fails, the pump won't come on and the engine... Read More »

Top Q&A For: How to Test a GM Fuel Pump Relay

How to Test a Fuel Pump Relay?

A fuel pump relay is like any other relay in terms of function. A relay uses a fairly low-power electrical signal to close a circuit that sends power to high-amperage devices like the starter, ele... Read More »

How to Test a Fuel Pump Relay on a 94 Ford Ranger?

A broken fuel pump relay causes a malfunctioning pump, starving the engine of fuel. The engine may stutter, stall or not start at all. Luckily, you can test the fuel pump relay in a 1994 Ford Range... Read More »

How to Test a Fuel Pump Relay on a 2002 GMC Yukon Denali?

The fuel system in the 2002 GMC Yukon has several electronic checking points. One of those checking points is the fuel pump relay. This relay opens the power circuit when the ignition is cut off, b... Read More »

How to Determine If a Fuel Pump Relay Is Bad?

A car's fuel pump relay turns on the fuel pump when the motor runs. When a relay is defective, it is usually because of a bad coil or bad connection. To check both operations, remove the relay by p... Read More »