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 Eagle Premier ESFACTORY OEM SERVICE PROCEDURE
Fuel Pump Relay
- Fuel pump relay is located in relay box, near battery. See Fig 1 . With relay in de-energized position, relay should have continuity between relay terminals No. 3 and 1. See Fig 2 . Measure resistance between relay terminals No. 5 and 2.
- Ohmmeter should read 70-80 ohms for resistor relays and 81-91 ohms for diode relays. Replace relay if not within specification. Not all relays have battery voltage connected to terminal No. 1. Some relays have battery voltage connected to terminals No. 4 or No. 3.
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.
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