RESISTANCE TEST -726280379

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.

DDEC ECM connector terminals are easily damaged. Use care when connecting and disconnecting 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 and

wires 240/241 from battery. Discard

lockwasher.

(3) Remove two mounting screws and heat

shield from DDEC ECM.

(4) Disconnect power harness connector

MC17 with connector remover.

(5) Loosen screw and disconnect vehicle

harness connector MC18 at DDEC

ECM.

(6) Read resistance between wire 530 at

engine harness connector, terminal P2

and wire 439 at vehicle harness

connector MC18, terminal B3.

(a) If there are less than 10,000 ohms

present, repair wires 530 and/or 439

(see schematic Fig 2-1, Fig 2-2) or

notify DS Maintenance and perform

Steps (8) through (15) below.

(b) If there are more than 10,000 ohms

present, go to Step (7) below.

(7) Read resistance between wire 530 at

engine harness connector, terminal P2

and wires 241 and 240 at power

harness connector MC17, terminals A,

B, E and F.

(a) If there are less than 10,000 ohms

present, repair wires 530, 241 and/or

240 (see schematic Fig 2-1, Fig 2-2)

or notify DS Maintenance and

perform Steps (8) through (15)

below.

(b) If there are more than 10,000 ohms

present, wires are OK.

(8) Connect vehicle harness connector

MC18 and tighten screw.

(9) Connect power harness connector

MC17.

(10) Install heat shield with two mounting

screws to DDEC ECM.

(11) Connect wires 240/241 to battery with

lockwasher, washer 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) Install right front fender skirt

(Para 17-33).

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