YG125-30B Maintenance Manual
Illumination signal system
140
Major faults diagnosis
Phenomenon
Possible causes
Solutions
l
Headlamp does not
illuminate;
l
Hi-beam does not
illuminate
l
Low-beam does not
illuminate
l
Both do not illuminate
l
Accumulator voltage too low;
l
Corresponding fuse is not connected or is
blown;
l
Corresponding switch failed;
l
Bulb failure;
l
Poor plugging of line;
l
Related lines of the main cable are open
l
Recharge the accumulator;
l
Connect the fuse or replace it;
l
Repair or replace switch;
l
Replace bulb;
l
Re-plug;
l
Repair or replace main cable.
l
Headlamp fails to
illuminate reliably
l
Poor contacting in fuse, bulb or lines;
l
Reconnect the poorly contacted
parts;
l
Headlamp illumination
small
l
Accumulator voltage too low;
l
Line contact voltage drop too large;
l
Headlamp body failed
l
Recharge the accumulator;
l
Repair the line;
l
Replace headlamp
l
Position lamp doesn
’
t
illuminate:
l
Front position lamp
doesn
’
t illuminate:
l
Sidecar front / rear
position lamp
l
Tail lamp doesn
’
t
illuminate;
l
Both do not illuminate
l
Corresponding fuse is not connected or is
blown;
l
Position lamp switch failed;
l
Bulb failure;
l
Poor contact in lines;
l
Related lines of the main cable are open
l
Connect the fuse or replace it;
l
Repair or replace the left switch;
l
Replace bulb;
l
Re-plug;
l
Repair or replace main cable.
l
Brake lamp does not
illuminate
l
Corresponding fuse is not connected or is
blown;
l
Front brake lamp switch failed;
l
Rear brake lamp switch failed;
l
Bulb failure;
l
Line failure
l
Connect the fuse or replace it;
l
Replace front brake lamp
switch
’
;
l
Adjust and replace rear brake
lamp switch;
l
Replace bulb
l
Inspection / Repair
l
Horn does not sound
l
Corresponding fuse is not connected or is
blown;
l
Horn button failed;
l
Horn failed;
l
Poor contact in lines;
l
Related lines of the main cable are open.
l
Connect the fuse or replace it;
l
Repair or replace the left switch;
l
Adjust or replace horn;
l
Re-plug;
l
Repair or replace main cable.
l
Turn signal lamp does
not illuminate;
l
Front turn lamp does
not illuminate;
l
Rear turn lamp does
not illuminate;
l
Both do not illuminate
l
Accumulator voltage too low;
l
Corresponding fuse is not connected or is
blown;
l
Left turn lamp switch failed;
l
Right turn lamp switch failed;
l
Flasher failed;
l
Bulb failure;
l
Poor contact in lines;
l
Related lines of the main cable are open.
l
Recharge the accumulator;
l
Connect the fuse or replace it;
l
Repair or replace the left switch;
l
Repair or replace the left switch;
l
Replace flasher;
l
Replace bulb;
l
Re-plug;
l
Repair or replace main cable.
Summary of Contents for YG125-30B
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