TM 5-3805-280-24-1
Sub-System Diagnostics
NOTE: A diode can fail in two modes, either shorted or open. Continuity will be
START RELAY COIL
YES: If continuity is
measured in one direction only in a serviceable diode. Use "diode checking mode" on
SUPPRESSION DIODE
measured in both checks,
meter when checking continuity.
(V9) CHECK
diode has failed in a
shorted mode. Replace.
NO: If continuity is NOT
measured in either check,
diode has failed in an
open mode. Replace.
NO: If continuity is
measured in one check
and not the other, diode
T118385 UN21NOV98
is OK.
Remove diode from connector.
Connect an ohmmeter to diode terminals.
Is continuity measured?
9015
15
Reverse ohmmeter probes.
19
Is continuity measured?
1/1
YES: Relay is OK. Check
BATTERY RELAY (K14)
S--Relay Coil +24 Volt Terminal
wiring harness.
CHECK
E--Relay Coil Ground Terminal
B--Relay Battery Input Terminal
A--Relay Battery Output Terminal
NO: Relay has failed.
Replace relay.
Disconnect harness from relay. Connect 24 volts to small
terminal S and ground small terminal E. Measure
continuity between large terminals A and B.
T8182AK UN03MAR94
Is continuity measured?
1/1
ALTERNATOR POWER
Disconnect fusible link from battery relay.
YES: Fusible link is OK.
60 AMP FUSIBLE LINK
Check wiring harness.
(F22) CHECK
Connect ohmmeter to both ends of fusible link. Measure
continuity between terminals.
NO: Fusible link has
failed. Replace fusible
link.
Is continuity measured?
T109319 UN28APR97
1/1
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