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.
1990 Geo Metro Base, 4D Hatchback, AutomaticFACTORY OEM SERVICE PROCEDURE
Fuel Pump Relay
- Fuel pump relay is located in relay box, located at left front corner of engine compartment. Fuel pump relay is the front relay on the inside (closest to fender) of relay box. Disconnect electrical connector from relay.
- Using an ohmmeter, ensure continuity exists between Black/White and Pink/White wire terminals of relay. Apply battery voltage to Black/White wire terminal and ground Pink/White wire terminal. Continuity should exist between White/Blue and Purple or Pink wire terminals of relay. Replace relay if continuity is not as specified.
Factory Service Tools
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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.