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.
1986 Merkur XR4Ti AutomaticFACTORY OEM SERVICE PROCEDURE
Fuel Pump Relay
- Remove fuel pump relay. Connect an ohmmeter between terminals No. 85 and 86. If the meter reads more or less than 85 ohms, replace the relay.
- Connect a jumper wire from the alternator output terminal to relay terminal No. 86 and another jumper wire from relay terminal No. 85 to chassis ground. When the ground connection is made, relay should click and an ohmmeter should show continuity between relay terminals No. 85 and 30. If relay does not show continuity, it must be replaced relay. See Fig 1 .
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.