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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)
Set multimeter select switch to
VOLTS DC.
(2)
Connect positive (+) multimeter lead
to glow plug relay R6, terminal 30
cavity.
(3)
Connect negative (-) multimeter lead
to a known good ground.
(4)
Set MAIN POWER switch to ON
position (TM 10-3930-669-10).
(a)
If there are not 22 to 24 vdc
present, perform Step (5) below,
repair wire 7 (see schematic
Appendix F) and go to Step 9 of
this fault.
(b)
If there are 22 to 24 vdc present,
wire 7 is OK.
(5)
Set MAIN POWER switch to OFF
position.
CONTINUITY TEST
(1)
Ground wire 30 glow plug terminal.
(2)
Set multimeter select switch to OHMS.
(3)
Check continuity between relay R6,
terminal 87 and glow plug terminal.
(a)
If there is no continuity, repair
wire 30 (see schematic
Appendix F).
(b)
If there is continuity, replace
relay R6.
(4)
Install relay R6 (Para 7-3).
(5)
Install engine ventilation panel
(Para 6-2).
2-239
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