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TM 9-2320-364-20-1
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry contacts positive electrical circuits,
a direct short may result. Damage to equipment, injury or death to personnel may occur.
Allow engine to cool before performing troubleshooting maintenance. If necessary use insulated pads
and gloves. Hot engine components will burn and cause personnel injury.
Corrosion inhibitor contains alkali. Do not get in eyes; wear goggles/safety glasses when using. Avoid contact
with skin. In case of contact, immediately wash area with soap and water. If eyes are contacted, flush eyes
with large amounts of water for at least 15 minutes and get immediate medical attention.
DDEC ECM connector terminals are easily
damaged. Use care when connecting and dis-
connecting connectors.
While applying torque to nut, hold screw with
wrench or damage to battery may occur.
RESISTANCE TEST
(1) Remove battery box cover
(TM 9-2320-364-10).
(2) Remove nut, washer, lockwasher,
wire 240 and 241 from battery.
Discard lockwasher.
(3) Remove two mounting screws and
heat shield from DDEC ECM.
(4) Disconnect power harness
connector MC17 from DDEC ECM
with connector remover.
(5) Read resistance between wires 417
and 439 at vehicle harness
connector MC18, terminals D2
and B3.
(a)  If 10,000 ohms or less are
present, repair wires 417 and
439. (See schematic Fig 2-3) or
notify DS Maintenance and
perform Steps (7) through (12)
below.
(b)  If more than 10,000 ohms are
present, perform Step (6) below.
(6) Read resistance between wire 417
on vehicle harness connector
MC18, terminal D2 and wires 241,
150 and 240, terminals A, B, D, E
or F.
(a)  If more than 10,000 ohms are
present, repair wires 241, 150
and/or 240 (see schematic Fig
2-1) or notify DS Maintenance
and perform Steps (7) through
(12) below.
(b)  If 10,000 ohms or less are
present, wires 241, 150 and 240
are OK.
(7) Connect power harness connector
MC17.
(8) Install heat shield with two mounting
screws to DDEC ECM.
(9) Connect wires 240/241 to battery
with lockwasher, washer and nut.
(10) Tighten nut to 23 lb-ft (31 N.m).
(11) Apply corrosion preventive compound
on nut.
(12) Install battery box cover.

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