RESISTANCE TEST -726280341

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 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.

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 at

DDEC ECM with connector remover.

(5) Loosen screw and disconnect vehicle

harness connector MC18 from DDEC

ECM.

(6) Read resistance between wire 432 at

engine harness connector, terminal P1

and wire 439 at vehicle harness

connector MC18, terminal B3.

(a) If there are 10,000 ohms or

less present, repair wires 432 and/or

439 (see schematic Fig 2-2 and/or

2-3) or notify DS Maintenance and

perform Steps (8) through (14) below.

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

present, go to Step (7) below.

(7) Read resistance between wire 432 at

engine harness connector, terminal P1

and wires 241 and 240 at power harness

connector MC17, terminals A, B, E and F.

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

present, repair wires 432, 241 and/or

240 (see schematic Fig 2-2 and/or

2-3) or notify DS Maintenance and

perform Steps (8) through (14) below.

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

present, wires 432, 241 and 240 are

OK.

(8) Connect wires 240/241 to battery with

lockwasher, washer and nut.

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

(10) Apply corrosion preventive compound

on nut.

(11) Install battery box cover.

(12) Connect power harness connector to

DDEC ECM.

(13) Connect vehicle harness connector

MC18 to DDEC ECM and tighten

screw.

(14) Install heat shield with two mounting

screws to DDEC ECM.

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