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TM 9-2320-364-20-1
Allow engine to cool before performing troubleshooting maintenance. If necessary use insulated pads and
gloves. Hot engine components will burn and cause injury to personnel.
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical
circuits, a direct short may result. Damage to equipment, injury or death to personnel may occur.
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.
While applying torque to nut, hold screw with wrench or damage to battery may occur.
DDEC ECM connector terminals are easily damaged. Use care when connecting and disconnecting terminals.
(1) Remove battery box cover.
(2) Remove nut, washer, lockwasher, wires
240 and 241 from battery. Discard
lockwasher.
(3) Remove two screws and heatshield from
DDEC ECM.
(4) Disconnect power harness connector
MC17 from DDEC ECM with connector
remover.
(5) Loosen screw and disconnect vehicle
harness connector MC18 at DDEC ECM.
(6) Are there more than 10,000 ohms
present between terminals D1 and B3 at
vehicle harness connector MC18.
(a)  If less than 10,000 ohms are present,
repair wires 240 and/or 241 (see
schematic Fig 2-3) or notify DS
Maintenance and perform Steps (8)
through (15) below.
(b)  If more than 10,000 ohms are
present, go to Step (6) below.
(7) Are there less than 10,000 ohms present
on the following wires:
wire 150 between power connector
MC17, terminal C and vehicle
harness connector MC18, terminal D1
wire 150 between power connector
MC17, terminal D and vehicle
harness connector MC18, terminal D1
wire 240 between power connector
MC17, terminal E and vehicle
harness connector MC18, terminal D1
wire 240 between power connector
MC17, terminal F and vehicle
harness connector MC18, terminal D1
(a)  If less than 10,000 ohms are present,
repair wires (see schematic Fig 2-3)
or notify DS Maintenance.
(b)  If more than 10,000 ohms are
present, perform Steps (8) through
(15) below.
(8) Connect power harness connector C17
to DDEC ECM.
(9) Connect vehicle harness connector
MC18 to DDEC ECM.
(10) Install heatshield with two screws.
(11) Connect wires 240 and 241 to battery
with washer, lockwasher and nut.
(12) Tighten nut to 23 lb-ft (31 N.m).
(13) Apply corrosion preventive compound
on nut.
(14) Install battery box cover.
(15) Close top engine access cover.

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