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.
1985 Merkur XR4Ti AutomaticFACTORY OEM SERVICE PROCEDURE
Inertia Switch Test
- Turn ignition switch to "RUN" position. Using a test light, check for battery voltage at both inertia switch wires. If light comes on at both wires, switch is okay. Go to IN-LINE FUSE TEST .
- If light does not come on at either wire, check for open circuit. If light comes on one wire, replace inertia switch and retest system. See Fig 1 and Fig 2 .
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.