VOLTAGE TEST -726280415

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.

VOLTAGE TEST

(1) Remove two screws and heat shield

from DDEC ECM.

(2) Disconnect power harness connector

MC17 from DDEC ECM with

connector remover.

(3) Connect positive (+) multimeter lead

to wire 241 at DDEC ECM power

connector MC17, terminals E and F

one at a time.

(4) Connect negative (- ) multimeter lead

to a known good ground.

(5) Turn ON ENGINE switch

(TM 9-2320-364-10).

(a) If 10 to 14 vdc are not present,

turn OFF ENGINE switch and

repair wire 241 (see schematic

Fig 2-3) or notify DS Maintenance

and perform Steps (7) through (9)

below.

(b) If 10 to 14 vdc are present, turn

OFF ENGINE switch and go to

Step (6) below.

(6) Connect positive (+) multimeter lead

to wire 240, terminals A and B one

at a time.

(a) If 10 to 14 vdc are not present,

turn OFF ENGINE switch and

repair wire 240 (see schematic

Fig 2-3) or notify DS Maintenance

and perform Steps (7) through (9)

below.

(b) If 10 to 14 vdc are present, wire

240 is OK. Turn OFF ENGINE

switch and perform Steps (7)

through (9) below.

(7) Connect power harness connector

MC17 to DDEC ECM.

(8) Install heat shield and two screws.

(9) Close top engine access cover.