Continuous Monitor Mode (Wiggle Test): Notes

1991 Mercury Cougar LS, 5.0 TSECTION Notes

The Continuous Monitor Mode allows technician to attempt a recreation of intermittent fault while monitoring the system. This mode, also called the wiggle test, may be used in both KOEO SELF-TEST and KOER SELF-TEST. The CIRCUIT TESTS specify the use of this procedure to identify intermittent faults in specific circuits or components.

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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.