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Home >> Ford >> 1990 >> Tempo Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/O Codes >> Intermittent Test Procedures >> Continuous Monitor Mode (Wiggle Test)
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Continuous Monitor Mode (Wiggle Test)

This test allows a technician to attempt to re-create an intermittent fault while monitoring the system. This mode, also called the "wiggle test", may be used in both Key On Engine Off (KOEO) and Key On Engine Running (KOER) Self-Test modes. The CIRCUIT TESTS in TESTS W/CODES article specify the use of this procedure to identify intermittent faults in specific circuits or components.