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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.
CONTINUITY TEST
·
Jewelry can catch on equipment and
(1)
Disconnect wiring from components at each
cause injury or short across electrical
end of wire.
circuit and cause severe burns or
(2)
Set multimeter to ohms position.
electrical shock. Remove rings,
bracelets, watches, necklaces, and any
NOTE
other jewelry before working around
A reading of infinity
HET Tractor.
indicates an open circuit.
(3)
Connect multimeter leads to each end of
Check ground wire no. 1435 from
wire and check multimeter for continuity.
DDEC HI IDLE relay for loose
connections, damage, and 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.
DDEC HI/IDLE 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.
(3)
Replace DDEC HI IDLE relay (para 7-27)
if no voltage is measured on wire no 510.
2-969
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