LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 1995 >> Aerostar Van Window, Standard >> Repair and Diagnosis >> Electrical >> Charging Systems >> Generator - MOTORCRAFT W/Internal Fan >> On-Vehicle Testing >> Field Circuit Drain Test

Field Circuit Drain Test

NOTE: Connect voltmeter negative lead to generator rear housing for all the following measurements.
  1. Turn ignition off. Measure voltage at terminal "F" screw head. See Figure. If less than battery voltage exists, go to next step. If battery voltage exists, system is functioning properly. Further testing is not needed.
  2. Measure voltage at terminal "I" of wiring harness connector. If voltage is zero, go to next step. If voltage is not zero, repair short to voltage in circuit "I".
  3. Measure voltage at terminal "S" of wiring harness connector (with connector connected to regulator). If voltage is not zero, go to next step. If voltage is zero, replace regulator.
  4. Unplug harness connector from regulator. Measure voltage at terminal "S" of harness connector. If voltage is not zero, repair short to voltage in wiring harness. If voltage is zero, replace generator.
scientia non olet · About LEMON Manuals