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.

1992 Mercury Tracer Base, 4D Wagon, AutomaticFACTORY OEM SERVICE PROCEDURE

Inertia Switch

If inertia switch is tripped, engine cannot be restarted until switch is manually reset. To reset inertia switch, depress switch button. Inertia switches may be found in the following locations:
- On Sable and Taurus, in left side of trunk (except station wagon).
- On Sable and Taurus station wagon models, behind access door in right rear cargo area.
- On all other vehicles, in trunk on left hinge support or behind trim panel.
  CAUTION: DO NOT reset inertia switch until fuel system has been inspected for leaks.
To test inertia switch, turn ignition off. Remove inertia switch. Shake inertia switch to force switch into tripped position (switch open).Measure resistance of switch. See INERTIA SWITCH RESISTANCE . Replace switch if resistance is incorrect, or if switch cannot be tripped.

INERTIA SWITCH RESISTANCE

Switch Position

Ohms

Open ⁽¹⁾

10,000+

Closed ⁽²⁾

0-5

⁽¹⁾	Indicates switch is in the tripped position.

⁽²⁾	Indicates switch is in the set position.

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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