10.24
ELECTRICAL
Regulator / Rectifier Test
• Remove the regulator / rectifier from the vehicle. NOTE: Unit must be cool for accurate testing.
•Use DIODE CHECK function on the Fluke 77 DMM
• Perform all tests described in test table below. Test results describe a properly functioning component.
Regulator / Rectifier Test Table - Set DMM to DIODE CHECK Function
DMM RED LEAD DMM BLACK LEAD RESULT
AC - 1 (3-wire connector) AC - 2 (3-wire connector) Open Circuit
AC - 2 (3-wire connector) AC - 3 (3-wire connector) Open Circuit
AC - 1 (3-wire connector) AC - 3 (3-wire connector) Open Circuit
AC - 2 (3-wire connector) AC - 1 (3-wire connector) Open Circuit
AC - 3 (3-wire connector) AC - 1 (3-wire connector) Open Circuit
AC - 3 (3-wire connector) AC - 2 (3-wire connector) Open Circuit
RED Battery + (2-wire connector) BLACK Ground (2-wire connector) Open Circuit
BLACK Ground (2-wire connector) RED Battery + (2-wire connector) 2300mV to 2400mV
BLACK Ground (2-wire connector) Regulator / Rectifier Case Closed Circuit (continuity)
BLACK Ground (2-wire connector) Any Phase Open Circuit
AC - 1 (3-wire connector) BLACK Ground (2-wire connector) Open Circuit
AC - 2 (3-wire connector) BLACK Ground (2-wire connector) 2200mV to 2300mV
AC - 3 (3-wire connector) BLACK Ground (2-wire connector) Open Circuit
RED Battery + (2-wire connector) Any Phase Open Circuit
AC - 1 (3-wire connector) RED Battery + (2-wire connector) 400mV to 500mV
AC - 2 (3-wire connector) RED Battery + (2-wire connector) 400mV to 500mV
AC - 3 (3-wire connector) RED Battery + (2-wire connector) 400mV to 500mV
NOTE: If the temperature of the regulator / rectifier exceeds
194 °F (90°C), the unit will turn itself off to cool down. The
unit will turn on at approximately 167°F (75°C). If it turns off,
verify the housing cooling fins are clean, free from debris
and that adequate airflow is present.
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