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b) If the fuse operates properly when the key switch SA9 on the dashboard is on in
the position «II» and in the position of under-steering switch SA8 «upper beam is on”,
check operability of the relay 10 under the dashboard. In case of failure – replace the re-
lay.
c) If the fuse and the relay operate properly when the key switch SA9 on the
dashboard is on in the position «II» and in the position of under-steering switch SA8 “upper
beam is on”, check by means of a tester if there is power supply on the terminals of joints
XS3.1, XS3.2 of upper beam circuits. If there is no power supply, restore faulty electrical
circuits from the block F5, relay 10, switches SA8 and SA9 to the non-operating lamp. If
there is power supply, replace the lamps EL1 or EL2 of the non-operating lamp.
7.15.4.7 Marker lights of lamps HL4, HL5, HL6, HL7 and the number-plate light 8
do not operate (all of them or some)
) Check operability of the corresponding fuses of the starboard side « » (15 ) and the
portside « » (7,5 ) on the fuse block F4. In case of failure – replace the corresponding
fuse.
b) If the fuses operate properly, check by means of a tester if there is power supply
on the terminal of the marker light «58» of the non-operating lamp when the switch SA9 is
on and availability of “load” on the non-operating lamp. If there is no power supply, restore
faulty electrical circuits from the switch SA9, block F4 to the non-operating lamp or replace
the switch SA9. If there is power supply, replace the corresponding glow lamps of the non-
operating lamp.
7.15.4.8 Turn indicators of lamps HL4, HL5, HL6, HL7 do not operate
) Check operability of fuse « » (7,5 ) on the fuse block F4. In case of failure – re-
place the fuse.
b) If the fuse operates properly, check by means of a tester if there is power supply
on the fuse block F4 (to fuses « » and « »). If there is no power supply on the fuse block,
check if there is power supply on the terminal «58» of the starter and instruments switch
SA10 with the switch key position «I». If there is power supply on the terminal «58», restore
faulty electrical circuits. If there is no power supply on the terminal «58»m replace the switch
SA10.
c) By means of a tester check if there is power supply on the terminal of turn indica-
tor «L/R» of the non-operating lamp when the turn switch S 8 is on and availability of
“load” on the non-operating lamp. If there is no power supply, restore faulty electrical cir-
cuits. If there is power supply, replace the turn indicator glow lamp of the corresponding
non-operating lamp.
d) In case the electrical circuits and switches operate properly, replace the flasher
unit
1.
Note – In case turn indicators operate in the mode of turn and do not operate in the
mode of alarm signaling, check operability of fuse « » (15 ) on the fuse block F5 and the
alarm signaling switch SB4. Replace the faulty element.
Note – When the switch SA8 or S 4 is on and the relay
1 operates properly, on
the terminal «49» of relay
1 there shall be constant voltage of 12V, on the terminal
«49 » there shall be discontinuous voltage of 12V.
7.15.4.9 Indicators of stop lights HL6, HL7 do not operate
) Check operability of fuse « » (15 ) on the fuse block F5. In case of failure - re-
place the fuse.
b) If the fuse operates properly, check power supply by means of a tester on the terminal
of the stop light «54» of the non-operating lamp when switch S 2 is on (brake pedals are de-
pressed) and availability of ‘load’ on the non-operating lamp. In case there is no power supply,
restore faulty electrical circuits from block F5 to the non-operating lamp or replace the switch
2. If there is power supply, replace the corresponding glow lamps of the non-operating lamp.
7.15.5 Search and elimination of failures in air conditioner electrics
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