Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Fuel Pump Relay (Fox)
- Ensure fuel pump fuse (No. 13) is not blown. If okay, remove fuel pump relay. Note terminals numbers molded on fuse/relay panel. With ignition on, check for battery voltage between the following locations:
- terminal No. 46 and ground
- terminal No. 48 and ground
- If voltage is not present, current is not reaching the relay. Repair as necessary and check fuel pump operation. If voltage is present, check for battery voltage between the following locations:
- terminal No. 48 and terminal No. 50
- terminal No. 46 and terminal No. 50
If voltage is not present, terminal No. 50 (ground circuit) is open. Repair as necessary and check fuel pump operation.
- If voltage is present, check for battery voltage between terminal No. 50 and terminal No. 51. If voltage is not present, the ignition signal is not making contact to the fuel pump relay. Repair as necessary and check fuel pump operation.
- If no faults can be found but the fuel pump operates when the relay is by-passed, replace fuel pump relay.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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