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Upper Contacts Test

CAUTION: Be sure the negative post of battery is always connected to ground. Incorrect battery polarity may result in wiring harness damage and may damage alternator rectifiers. Do not ground alternator field circuit, as this may damage the regulator.
  1. Increase engine speed to 2200 RPM.
  2. Rotate Tester Control Knob to 1/4 OHM position only if Tester Ammeter reads over 5 amperes.
    Fig 1: Upper Contact Voltage Adjustment (Upper Contact Point Gap)
    G09333234Courtesy of CHRYSLER GROUP, LLC
  3. Rotate Tester Field Control from the DIRECT position to the OPEN position and then back to the DIRECT position to cycle the system.
  4. Observe voltmeter. Voltmeter now indicates setting of the voltage regulator upper contacts. Refer to specifications.

    Voltage should increase not less than.2 volt or more than.7 volt above previous operating voltage setting recorded in lower contact test. A voltage reading of less than.2 volt or more than.7 volt is an indication of a possible wrong air gap setting, refer to "Regulator Mechanical Adjustments".

  5. Rotate Tester Field Control to OPEN position and Control Knob to DIRECT position. After tests completed, reduce engine speed to idle, disconnect all test leads and adapters. Restore all regular wiring connections.

    AMBIENT TEMPERATURE NOTE: The ambient temperature is the temperature registered on a reliable thermometer positioned 1/4" from regulator cover. 

    Voltage Setting - Ambient Temperature

    Temp. Volts
    47°F 13.6-14.6
    70°F 13.5-14.5
    93°F 13.4-14.4
    117°F 13.3-14.3
    140°F 13.2-14.2
    163°F 13.1-14.1
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