127
5.6. Electrical equipment
The system of electric equipment is wired as a single-conductor circuit in which the neg-
ative terminals of power-supply sources and consumers are grounded to the truck body. The nega-
tive terminal of the storage battery is connected with the «ground» by a distance switch.
The power-supply sources are two storage batteries, connected in series, and a generator
that operates in conjunction with an integrated voltage regulator. The units and instruments relat-
ing to the electric equipment are connected by P.V.C.-insulated conductors of various sections.
For easy location and assembling of wires in bunches, they have a particular coloring. Single
wires may be of any color. The wire coloring is marked with the first letter of the color name on
the collars provided on both ends of the wire.
The wires are connected to each other and with the instruments by plug and socket
joints.
The truck has electronic speedometer, electronic devices and systems: tachometer, gen-
erator with rectifier assembly, etc.
To ensure reliable operation of the said instruments and systems, care should be taken to
the condition of the fuses installed in boxes. Avoid the use of non-standard fuses such as bended
wires, bolts, washers, because it will result in immediate failure of the electronic items if a short-
circuit occurs. A blown-out fuse should be replaced by the one having the same value of working
current.
The electric circuit diagram for trucks is shown in Fig. 106 (see the insert). Underlines to
Fig. 106 are given in Table 9.
Tab le 9 - Electric devices
Item,
Fig. 106
Description
Item type or number
1
Front lamp
ПФ
130
АБ
-01 or 112.02.022
2
Right headlamp electric drive
-
3
Right headlamp
62.3711-19 or 401.3711
4
Low-tone sound signal
С
306
Д
or 24.3721
5
High-tone sound signal
С
307
Д
or 241.3721
6
Left headlamp
62.3711-19 or 401.3711
7
Left headlamp electric drive
-
8
Side turn light
511.3726010 or
УПБ
1.101
9
Front clearance light
264.3712
10
Side clearance light
431.3731-01 or 50.3731-05
11
Cab dome light
ПТ
37-3
М
12
Road train sign light
2512.3726-02
13
Windshield wiper relay
S 4031.3747
14
Windshield wiper electric drive
29.3780
15
Windshield washer fuse
ПР
119-01 (6
А
)
16
Windscreen wiper and washer switch located under steer-
ing wheel
9902.3709-01
17
Turn lights and headlamp beam switch located under steer-
ing wheel
1102.3769-02
18
External lighting switch
П
305-3709000-0
