Test Results

If voltmeter reading indicates over-voltage (more than 2 volts above battery voltage), shut off engine and check ground connections between regulator and alternator and/or regulator and engine. Clean and tighten connections and repeat test.

Fig 1: Side View Showing Alternator Terminal Location on Side Terminal Models Connections must be clean and tight.
Courtesy of FORD MOTOR CO.
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.
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.