RESISTANCE TEST -726280465

TM 9-2320-364-20-1

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.

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.

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, wires

240 and 241 from battery. Discard

lockwasher.

(3) Remove two mounting screws and heat

shield from DDEC ECM.

(4) Disconnect power harness connector

MC17 at DDEC ECM with connector

remover.

(5) Loosen screw and disconnect vehicle

harness connector MC18.

(6) Set multimeter select switch to ohms.

(7) Are there 10,000 ohms or more present

between wires 916 and 439 at vehicle

harness connector MC18, terminals A3

and B3.

(a) If 10,000 ohms or less are present,

repair wires 916 and 439 (see

schematic Fig 2-1) or notify DS

Maintenance and perform Steps (9)

through (16) below.

(b) If 10,000 ohms or more are present,

go to Step (8) below.

(8) Are there 10,000 ohms or less present

between wire 916 on vehicle harness

connector MC18, terminal A3 and wires

241 and 240, terminals A, B, E or F on

power harness connector MC17?

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

present, repair wires 241 and/or 240

(see schematic Fig 2-3) or notify DS

Maintenance and perform Steps (9)

through (16) below.

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

present, wires 241 and 240 are OK.

Perform Steps (9) through (16)

below.

(9) Connect power harness connector

MC17.

(10) Connect vehicle harness connector

MC18 and tighten screw.

(11) Install heat shield with two mounting

screws to DDEC ECM.

(12) Connect wires 240/241 to battery with

washer, lockwasher and nut.

(13) Tighten nut to 23 lb-ft (31 N.m).

(14) Apply corrosion preventive compound

on nut.

(15) Install battery box cover.

(16) Close engine access cover.

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