TM 10-5410-228-24
1.
NO POWER TO SYSTEM WITH ECV RUNNING NO AIR, NO LIGHTS, NO READINGS ON
CONVERTER.
Shut ECV off.
Disconnect connector plug P2 from
relay box (see para 2.13.19).
Check for 24 Vdc across pins G to J &
F to J of cable assembly 1A4W1,
connector P2.
Set POWER MODE selector switch to EXT.
Set ESS MODE selector switch to OFF.
No
24 Vdc present
Do a continuity check of the cable assembly
across both?
1A4W1.
Yes
Reconnect connector plug
P2 to relay box.
No Notify direct support
Does continuity
to repair cable
exist?
assembly 1A4W1.
Set POWER MODE selector switch to EXT.
Yes
Set ESS MODE selector switch to OFF.
Turn ECV OFF.
Gain access to pan and frame at
Disconnect batteries (see TM 9-2320-387-24-1).
foot well.
Disconnect cable 1A1W1.
Tag power panel, cab area, and battery area.
Turn ignition switch to RUN.
Do not start.
Check for 24 Vdc at pins A to
P & N to P of connector P1.
Turn ignition switch to OFF.
Gain access to relay box.
Remove relay A17K1
24 Vdc present
Yes
Apply 24 Vdc across pins X1 AND X2.
across both?
Test for continuity between pins A1
and A2.
No
Turn ignition switch to OFF.
Disconnect cable assembly 1A1W1
at power stud and ground 7A &
No
CB2 .
Replace relay
Does continuity
Test for continuity between pin A
exist?
to (power stud), pin P to ground
7A, and pin N to CB2 & 29D.
Yes
1
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