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TM 9-2320-364-20-2
2-1549
(1) Set multimeter select switch to ohms.
(2) Is there continuity on wire 1435
between trailer L.H. turn relay R15,
terminal 85 and a known good
ground?
(a) If there is no continuity, repair
wire 1435 (see schematic
Fig 2-32) or notify DS
Maintenance.
(b) If there is continuity, wire 1435 is
OK.
CONTINUITY TEST
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical
circuits, a direct short may result. Damage to equipment, injury or death to personnel may occur.
Circuit breakers CB5, CB6, CB12, CB20, CB22, CB23 and relays R3, R13 - R19, R26, R28, R32, R33
are always electrically hot and can cause severe injury to personnel. Care must be exercised when
working under the electrical circuit board cover.
(1) Set multimeter select switch
to volts dc.
(2) Connect positive (+) multimeter lead
to wire 1003C at trailer L.H. turn relay
R15, terminal 87.
(3) Connect negative (–) multimeter lead
to known good ground.
(4) While assistant applies brake pedal,
observe multimeter.
(a) If 22 to 28 vdc are not present,
release brake pedal and
replace relay R15 (Para 7-95).
(b) If 22 to 28 vdc are present,
release brake pedal and repair
wire 1003C (see schematic
Fig 2-32) or notify DS
Maintenance.
(5) Install two ECB covers and 15 screws.
VOLTAGE TEST
NOTE
Relay test must be performed with relay
partially removed.
NOTE
Relay test must be performed with relay
partially removed.
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