(1) Connect positive (+) multimeter lead
to wire 1871 at DDEC trans circuit
(2) Connect negative () multimeter lead
to a known good ground.
(3) Turn ON ENGINE switch
(a) If 10 to 14 vdc are not present,
turn OFF ENGINE switch and
repair wire 1871 (see schematic
Fig 2-38) or notify DS
(b) If there are 10 to 14 vdc present,
wire 1871 is OK. Repair wire
1711 (see schematic Fig 2-38) or
notify DS Maintenance.
(4) Turn OFF ENGINE switch.
(5) Install two ECB covers and 15 screws.
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.