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Home >> Ford >> 1990 >> Bronco II 4WD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Test Ml - Check Engine/Malfunction Light >> Test Ml: Step 10
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Test Ml: Step 10

10) CHECK ENGINE or SERVICE ENGINE SOON Intermittent, Check For Intermittent Short From STO to Ground  If vehicle does not start, go to TEST A, step 1). The light will come on when a Continuous Memory Code is present. Service all Continuous Memory Codes before proceeding. If no codes are outputted, proceed with this test. Enter KOEO Continuous Monitor Mode (WIGGLE TEST). Observe DVOM for indication of fault while performing WIGGLE TEST on the harness in the following areas:

If a fault is indicated, repair as necessary and rerun QUICK TEST. If a fault is not indicated, fault cannot be duplicated at this time. Testing for this fault is complete.

NOTE: There is a break in the step numbering sequence at this point, skipping from step 10) to step 15). Break is due to previous chart references to these testing procedures. No test procedures have been omitted.