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TM 10-3930-669-20
19. GLOW PLUG INDICATOR DOES NOT OPERATE (CONT).
KNOWN INFO
24 vdc circuits operate.
Fuse 4 OK.
POSSIBLE PROBLEMS
Indicator wire 30 is faulty.
Relay R6 ground wire faulty.
Indicator ground wire faulty.
Wire 7 faulty.
Terminal 85 ground wire faulty.
Relay R6, wire 30, terminal 30
faulty.
Relay R6, wire 30, terminal 87
faulty.
Wire 29 faulty.
Glow plug switch faulty.
Wire 31 faulty.
TEST OPTIONS
Voltage test.
STE/ICE-R #89.
REASON FOR QUESTION
If 22 to 24 vdc are not present,
fault is somewhere else. If 22
to 24 vdc are present, indicator
circuit is faulty.
2-230
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