TM 9-2320-280-20-1
ALTERNATOR
2-224.12 Change 1
KNOWN INFO
POSSIBLE PROBLEMS
VOLTAGE OUTPUT
INCORRECT
ALTERNATOR
REGULATOR
WIRING
TEST OPTIONS
REASON FOR QUESTION
1. STE/ICE-R TEST 89
(page 2-750)
2. MULTIMETER
As wire 568A is stubbed off, the
voltage from wire 5A on red
terminal signals regulator to turn
on.
DIAGNOSTIC FLOWCHART
FROM H3, Page
2-224.10
NO
NOIFY DS
MAINTENANCE TO
REPAIR OR REPLACE
WIRING HARNESS
KNOWN INFO
POSSIBLE PROBLEMS
ALTERNATOR
REGULATOR
VOLTAGE OUTPUT
INCORRECT
REGULATOR HAS
ENERGIZING VOLTAGE
TEST OPTIONS
REASON FOR QUESTION
STE/ICE-R TEST 10 AND 90
(pages 2-734 and 2-751)
This connection applies full current
loading to field coil. Alternator
current output should be near
maximum.
H4
TURN ROTARY SWITCH TO RUN
POSITION. CHECK FOR BATTERY
VOLTAGE AT RED (ENERGIZE)
TERMINAL ON REGULATOR. IS
BATTERY VOLTAGE PRESENT?
H5
DISCONNECT ALTERNATOR-
TO-REGULATOR CABLE. START
ENGINE AND SET IDLE 1200-1500
RPM. USING 15-AMP CAPACITY
JUMPER WIRE, MOMENTARILY
CONNECT TO PIN A OF ALTERNATOR
CONNECTOR. DOES CURRENT AND
VOLTAGE RISE DURING
CONNECTION?
NO
REPLACE REGULATOR
(Para 4-5.11). THEN GO TO
5, Page 2-198
YES
YES
REPLACE REGULATOR
(Para 4-5.14). THEN GO
TO 5, Page 2-198