TM 9-2320-280-20-1
ALTERNATOR
2-224.8 Change 1
KNOWN INFO
POSSIBLE PROBLEMS
VOLTAGE OUTPUT
INCORRECT
REGULATOR HAS
ENERGIZING
VOLTAGE
ALTERNATOR
REGULATOR
WIRING
TEST OPTIONS
REASON FOR QUESTION
MULTIMETER
Determine if high or low output
voltage.
DIAGNOSTIC FLOWCHART
FROM G23
Page 2-224.2
NO
IF OUTPUT VOLTAGE IS NOT
CORRECT, REPLACE REGULATOR
(Para 4-5.10). RECHECK VOLTAGE.
IF VOLTAGE IS STILL NOT
CORRECT, REPLACE ALTERNATOR
(Para 4-5.7)
KNOWN INFO
POSSIBLE PROBLEMS
ALTERNATOR
REGULATOR
VOLTAGE OUTPUT
INCORRECT
TEST OPTIONS
REASON FOR QUESTION
1. STE/ICE-R TEST 89
(Pages 2-750)
2. MULTIMETER
As wire 568A is stubbed off, the
voltage from wire 5A on red terminal
signals regulator to turn on.
G4
IDLE ENGINE AT 1200-1500 RPM. DOES
VOLTAGE ON 14 VOLT OUTPUT
TERMINAL (YELLOW INSULATOR)
MEASURE BETWEEN 13.4-14.6 VOLTS?
G5
TURN ROTARY SWITCH TO RUN
POSITION. CHECK FOR BATTERY
VOLTAGE AT RED (ENERGIZED)
TERMINAL ON REGULATOR. IS
BATTERY VOLTAGE PRESENT?
NO
NOTIFY DS MAINTENANCE
TO REPAIR OR REPLACE
WIRING HARNESS
YES
YES
REPLACE REGULATOR
(Para 4-5.10). THEN GO
TO 5, Page 2-198
