LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 1990 >> Bronco II RWD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Computerized Engine Controls >> Electronic Control Assembly (ECA) >> Ground Circuits
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Ground Circuits

  1. Using an ohmmeter, check for continuity to ground on ECA terminals No. 40 and No. 60. See Figure . Resistance should be zero ohms. If resistance is not zero, repair open.
  2. Using a DVOM, touch negative lead to a good ground. Touch positive lead to each ground terminal. With vehicle running, voltmeter should indicate less than 1 volt. If voltmeter reading is greater than 1 volt, check for open, corrosion or loose connection on ground lead.
scientia non olet · About LEMON Manuals