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

Inertia Switch

  1. Turn ignition off. Remove inertia switch. On 1.8L engines, switch is located on right rear strut tower. On 2.2L engines, switch is located on left rear wheelwell storage compartment.
  2. Shake inertia switch to force switch into tripped position (switch open). Measure resistance of switch at designated wiring harness terminal (appropriate color). See INERTIA SWITCH RESISTANCE  . Replace switch if resistance is incorrect, or if switch cannot be tripped.
INERTIA SWITCH RESISTANCE

Switch Position Wiring Circuit Resistance (Ohms)
1.8L
Open (1) Blue & Black Over 10,000
Closed (2) Blue & Black 0-5
2.2L
Open (1) White/Red & Black Over 10,000
Closed (2) White/Red & Black 0-5
(1) Indicates switch is in tripped position.
(2) Indicates switch is in 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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