82.3-0000010 OM
234
6.12 Possible failures in the electrical equipment and instructions for trouble-
shooting
6.12.1 General information
Electrical equipment of the BELARUS-82.3 tractors includes electrical parts
(switches, relays, electrical engines, instruments, lamps, headlights, fuses, relay interrupt-
ers, sensors, etc.) as well as wires and electrical connections which serve to connect a
part to power supply and to the ground. To facilitate the task and troubleshoot in the elec-
trical equipment, an electrical circuit diagram for the electrical equipment is attached to this
manual (Annex E).
Before starting the operation on troubleshooting in any of the electrical circuits, it is
required to study carefully the electrical diagram to familiarize yourself with the functional
purpose of the electrical circuit. Narrowing the circle of troubleshooting is usually done by
gradually identifying and eliminating normally functioning components of the same circuit.
In case several electrical components fail to operate properly simultaneously, the most
probable reason for a failure can be blow-out of the corresponding fuse or the absence of
“ground” (different electrical elements in many cases can be closed to one fuse or to a sin-
gle “ground” terminal).
Electrical equipment failures can be explained by simple reasons like terminal cor-
rosion, failure of cutout fuses, blow-out of a fuse link or a switching relay defect. Check
visually the condition of all fuses, wires and electrical connections of the circuit before
starting the specific check of its component failures.
In case of using test instruments for detecting a failure, plan carefully, in accordance
with the attached electrical diagram, the succession of the instrument’s connection to the
circuit to detect the failure most effectively. The main test instruments include a tester
(multimeter) of electrical circuits, a voltmeter (a 12-volt check lamp can be used (about 21
W) with a set of connection cables), an indicator of the circuit segment conductivity (a test-
er) which includes a lamp, an electrical power source and a set of connection cables.
Electrical circuit troubleshooting cannot be regarded as a complicated task if taking
into consideration the fact that current is supplied to all electrical elements (lamp, electrical
motor, etc.) from the battery by wires through switches, relays, fuses, fuse links, and then
goes back to the battery through the tractor “ground”. Any problems related to the electri-
cal equipment failure can be caused only by termination of electrical current supply from
the battery or electrical current return to the battery.
Note – The information provided in this subsection 6.12 “Possible failures in the
electrical equipment and instructions for troubleshooting” shall be used for eliminating fail-
ures of the ECS for the rear axle DL, the FDA drive and the rear power take-off shaft.
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