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TM 9-2320-360-20-1
WARNING
· Batteries must be disconnected
before tightening any connections.
Failure to comply may result in
injury to personnel.
· Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock. Remove
rings, bracelets, watches,
necklaces, and any other jewelry
before working around HET
Tractor.
NOTE
If voltage on wire no. 510 exceeds
4.7 volts for more than 2 seconds,
DDEC will log Code 12.
DDEC HI/DLE RELAY TEST
NOTE
Engine must be running,
PTO control switch placed
in the on position, and
engine speed control
switches In the HIGH
position to perform this test
(1)
Place positive (+) probe of multimeter on
wire no. 510 at DDEC HI IDLE relay.
(2)
Place negative (-) probe of multimeter on
ground and look for voltage on multimeter.
Check wire no. 1154 from P.T.O. HI IDLE relay
to ENGINE SPEED CONTROL switches for
loose connections, damage, and continuity test.
CONTINUITY TEST
(1)
Disconnect wiring from components at each
end of wire.
(2)
Set multimeter to ohms position.
NOTE
A reading of infinity
indicates an open circuit.
(3)
Connect multimeter leads to each end of wire
and check multimeter for continuity
NOTE
A reading of other than infinity
indicates a grounded wire.
(4)
Remove multimeter lead from one end of
wire and connect to chassis ground.
Change 1 2-963
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