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TM 10-3930-673-20-1
VOLTAGE TEST
(1) Set multimeter to volts dc.
(2) Connect multimeter positive (+) lead to
relay K1 where wire 3 connects.
(3) Connect multimeter negative () lead to
known good ground.
(4) Connect negative battery cable to
negative side of battery (Para 8-44).
(5) Turn engine start switch ON, BUT DO
NOT START ENGINE
(TM 10-3930-673-10).
(a) If 24 vdc is present, repair wire 3
(Para 8-48).
(b) If 24 vdc is not present, go to
Step 9 of this fault.
(6) Turn engine start switch to OFF
position (TM 10-3930-673-10).
(7) Disconnect negative battery cable
(Para 8-44).
RELAY K1
VOLTAGE TEST
(1) Set multimeter to volts dc.
(2) Connect multimeter positive (+) lead to
relay K1 where wire 1 connects.
WIRE 3
WIRE 1
(3) Connect multimeter negative () lead to
known good ground.
TR01098
(4) Connect negative battery cable to
negative side of battery (Para 8-44).
(5) Turn engine start switch ON, BUT DO
NOT START ENGINE
(TM 10-3930-673-10).
(a) If 24 vdc is present, replace relay
K1 (Para 8-23).
(b) If 24 vdc is not present, go to
Step 10 of this fault.
(6) Turn engine start switch to OFF
position (TM 10-3930-673-10).
(7) Disconnect negative battery cable
(Para 8-44).
2-73

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