How to Test for a Faulty Fuel Pump on a Saturn S Series

Step-by-Step Guide

1. 1

   Step 1: Listen for the fuel pump to run.

   Turn the key to "on" without starting the care and listen for a "whirring" noise to occur.
   
   It should last for about two seconds and should be coming from the rear of the vehicle as the pump is in the gas tank. , The relay is in the inner passenger side fuse box.
   
   Turn the key to "on" without starting the care and listen for a click coming from the relay.,, Peel back the carpeting in the trunk on the driver side paneling behind the wheel well.
   
   There is a connector there with three wires: green, black, and grey.
   
   Use a multi-meter to probe the hot grey wire and touch a ground.
   
   Turn the car to "on" and you should see 12V for 2 seconds., Test for continuity between the ground contact on the fuel module and another ground (bare metal) on the car., You may also have a dirty and blocked fuel filter.
2. 2

   Step 2: Listen for the relay to switch.

3. 3

   Step 3: If the relay is not "clicking

4. 4

   Step 4: " try swapping it for the relay that controls the horn (if the horn is working).

5. 5

   Step 5: Test for voltage to the pump.

6. 6

   Step 6: Test the ground on the pump.

7. 7

   Step 7: If you have voltage to the pump and the ground is good

8. 8

   Step 8: then you may have a faulty fuel pump.

Detailed Guide

About the Author