LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 1990 >> Bronco 4.9 Y, Standard, M5OD-R2 >> Repair and Diagnosis >> Electrical >> Charging Systems >> Alternator - Models W/External Regulator >> Test Results

Test Results

  1. If voltmeter reading indicates more than 2.5 volts above battery voltage, stop engine, and connect jumper wire between regulator base and alternator frame. Repeat CHARGING SYSTEM TESTING.
  2. If voltage is less than 2.5 volts above battery voltage, check ground connections on alternator and regulator. Repeat test once repair is made.
  3. If overvoltage condition still exists, disconnect regulator wiring plug and repeat CHARGING SYSTEM TESTING. If condition is corrected, replace regulator and repeat test.
  4. If overvoltage still exists with regulator disconnected, repair wiring harness between alternator and regulator circuits "A" and "F". Connect regulator and repeat tests once repair is made.
scientia non olet · About LEMON Manuals