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TM 9-2320-360-20-1
NOTE
The following flow chart should only be
used if DDEC troubleshooting was
started on p. 2-80 and you were referred
here.
CAUTION
Use jumper wire only between terminals
indicated. Failure to comply may result
in damage to DDEC components or
wiring.
(1)
Turn ENGINE switch OFF and
disconnect vehicle harness
connector at ECM.
(2)
Install a jumper wire between
socket B1 on vehicle harness
connector and a good ground.
(3)
Turn ENGINE switch ON (engine
not running).
WARNING
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.
VOLTAGE TEST
Check for ignition by removing jumper
wire and reading voltage on vehicle
harness connector, socket B3 (red
lead)to a good ground (black lead)
with the Ignition on and engine off.
CONTINUITY TEST
(1)
Turn ignition OFF.
(2)
Remove CHECK
ENGINE light bulb
(para 7-40).
(3)
Read resistance between
terminals of light bulb.
2-283
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