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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.
Indicator wire 30 OK.
Relay R6 ground wire OK.
Indicator ground wire OK.
POSSIBLE PROBLEMS
Wire 31 faulty.
Terminal 85 ground wire faulty.
Relay R6, wire 7, terminal 30
faulty.
Relay R6, wire 30, terminal 87
faulty.
Wire 29 faulty.
Glow plug switch faulty.
Wire 7 faulty.
KNOWN INFO
24 vdc circuits operate.
Fuse 4 OK.
Indicator wire 30 OK.
Relay R6 ground wire OK.
Indicator ground wire OK.
Wire 31 OK.
POSSIBLE PROBLEMS
Terminal 85 ground wire faulty.
Relay R6, wire 7, terminal 30
faulty.
Relay R6, wire 30, terminal 87
faulty.
Wire 29 faulty.
Glow plug switch faulty.
Wire 7 faulty.
TEST OPTIONS
Voltage test.
STE/ICE-R #89.
REASON FOR QUESTION
This question eliminates a
possible problem or group of
possible problems determining
where troubleshooting
continues.
TEST OPTIONS
Continuity test.
STE/ICE-R #91.
REASON FOR QUESTION
If continuity is not present, relay
R6 ground wire is faulty.
2-236
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