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TM 9-2320-364-20-2
2-1531
(1) Set multimeter select switch to
volts dc.
(2) Connect positive (+) multimeter lead
to wire 1017 at trailer service lights
relay R14, terminal 86.
(3) Connect negative (–) multimeter lead
to known good ground.
(4) Turn ON ENGINE switch
(TM 9-2320-364-10).
(a) If 10 to 14 vdc are not present,
turn OFF ENGINE switch and
repair wire 1017 (see schematic
(Fig 2-35) or notify DS
Maintenance.
(b) If 10 to 14 vdc are present, wire
1017 is OK.
(5) Turn OFF ENGINE switch.
(1) Remove 15 screws and two
ECB covers.
(2) Connect positive (+) multimeter lead
to wire 1676 at trailer service lights
relay R14, terminal 30.
(3) Connect negative (–) multimeter lead
to known good ground.
(a) If 22 to 28 vdc are not present,
repair wire 1676 (see schematic
Fig 2-35) or notify DS
Maintenance.
(b) If 22 to 28 vdc are present, wire
1676 splice is OK from relay R14,
terminal 30 to splice.
VOLTAGE 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.
NOTE
Relay test must be performed with relay
partially removed.
NOTE
Relay test must be performed with relay
partially removed.
VOLTAGE TEST
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