RESISTANCE TEST -726280443

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.

RESISTANCE TEST

(1) Disconnect both injector harness

connectors at DDEC ECM with

connector remover.

(2) Read resistance between wires 619

and 611 at injector harness

connector, terminals G and L.

(a) If more than 5 ohms are present,

repair wire 619 (see schematic

Fig 2-4) or notify DS Maintenance

and perform Steps (4) through (8)

below.

(b) If less than 5 ohms are present,

wire 619 is OK.

(3) Read resistance between wires 620

and 612 at injector harness connector,

terminals E and A.

(a) If more than 5 ohms are present,

repair wires 620 (see schematic

Fig 2-4) or perform Steps (4)

through (8) below and notify DS

Maintenance.

(b) If less than 5 ohms are present,

wire 620 is OK. Perform Steps (4)

through (8) below and go to

Step 16 of this Fault.

(4) Connect power harness connector

MC17 to DDEC ECM.

(5) Connect both injector harness

connectors to DDEC ECM.

(6) Install heat shield and two mounting

screws.

(7) Install rocker arm covers (Para 3-4

and/or 3-5).

(8) Close top engine access cover.