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 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.
DDEC ECM connector terminals are easily
damaged. Use care when connecting and
disconnecting connectors.
RESISTANCE TEST
(1) Loosen screw and disconnect engine
harness connector at DDEC ECM.
(2) Read resistance between wires 120
and 452 at engine harness connector,
terminals R2 and Y2.
(a) If there are less than 10,000 ohms
present, repair wires 120 and/or
452 (see schematic Fig 2-2) or
notify DS Maintenance.
(b) If there are more than 10,000
ohms present, wires 120 and 452
are OK.
(3) Connect OTS connector.
(4) Install cab engine access panel and
22 washers, lockwashers and screws.
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