Upper Contacts
CAUTION:
Be sure 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 regulator.
- Increase engine speed to 2200 RPM. Adjust carbon pile to decrease current load to seven amperes and measure temperature at regulator cover to ensure it is the same as for lower contacts test. Cycle regulator circuit by momentarily opening and closing the on-off switch several times.
- Voltmeter will now indicate setting of upper contacts. Voltage increase should be 0.2 - 0.7 volts above that obtained with regulator operating on lower contacts. If voltage increase is not within limits, air gap and/or contact clearance is out of specification limits and must be adjusted. See Adjustments .