How to Determine If a Fuel Pump Relay Is Bad?

Answer 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 »

Top Q&A For: How to Determine If a Fuel Pump Relay Is Bad

What Is a Fuel Pump Relay?

Almost all cars use some sort of relay to activate the fuel pump. Relays take the low-voltage current applied by a switch and use it to close the high voltage circuit required to run a connected d... Read More »

How do I Check a 350 5.7L Fuel Pump Relay?

The fuel pump relay on a Chevy 5.7L V-8 is nothing more than a remote control switch. The switch is divided into two sections, each having two posts for a total of four posts. The first section rec... Read More »

How to Test a GM Fuel Pump Relay?

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 »

Troubleshooing a Fuel Pump Relay?

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