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TM 10-3930-669-20
WARNING
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry contacts battery terminal, a
direct short may result in instant heating of tools, damage to equipment, and injury or death to
personnel.
VOLTAGE TEST
(1)
Remove engine ventilation panel
(Para 6-2).
(2)
Remove relay R6 (Para 7-33).
(3)
Set multimrneter select switch to
VOLTS DC.
(4)
Connect positive (+) multimeter lead
to glow plug relay R6, terminal 86
cavity.
(5)
Connect negative (-) multimeter
lead to a known good ground.
(6)
Set MAIN POWER switch to ON
position (TM 10-3930-669-10).
(7)
Set engine switch to ignition position
(TM 10-3930-669-10).
(8)
Depress glow plug switch
(TM 10-3930-669-10).
(a)
If there are not 22 to 24 vdc
present, perform
Steps (9) and (10) below and
go to Step 9 of this Fault.
(b)
If there are 22 to 24 vdc present,
perform Steps (9) and (10) below
and go to Step 6 of this Fault.
(9)
Set engine switch to off position.
(10) Set MAIN POWER switch to OFF
position.
CONTINUITY TEST
(1)
Set multimeter select switch to OHMS.
(2)
Check continuity between relay R6,
terminal 85 cavity and a known good
ground.
(a)
If there is no continuity, replace
relay R6 ground wire (See
schematic Appendix F).
(b)
If there is continuity, relay R6
ground wire is OK.
2-237
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