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Home >> Ford >> 1981 >> Bronco 5.0L Eng VIN F, Automatic Trans >> Repair and Diagnosis >> Electrical >> Charging Systems >> MOTORCRAFT Alternators >> Testing >> Test Results

Test Results

  1. If voltmeter reading indicates over-voltage (more than two volts above battery voltage), shut off engine and check ground connections between regulator and alternator and/or regulator and engine. Clean and tighten connections, then repeat tests.
    Fig 1: View Showing Alternator Terminal Location on Side Terminal Models
    G09316922Courtesy of FORD MOTOR CO.
  2. If over-voltage condition still exists, disconnect regulator wiring plug and repeat steps  2 and  3 of "Voltmeter Test Procedures"  . If condition is corrected, replace regulator and repeat test.
  3. If over-voltage still exists with regulator disconnected, a short is indicated in wiring harness between alternator and regulator (Circuits "A" and "F"). Repair short circuit, and then replace regulator, repeating tests with regulator plug connected.
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