Checking The Bulbs And Bulb Sockets - Yamaha 2009 YFM25RY Service Manual

EAS27990
CHECKING THE BULBS AND BULB SOCK-
ETS
Check each bulb and bulb socket for damage
or wear, proper connections, and also for conti-
nuity between the terminals.
Damage/wear → Repair or replace the bulb,
bulb socket or both.
Improperly connected → Properly connect.
No continuity → Repair or replace the bulb,
bulb socket or both.
Types of bulbs
The bulbs used on this vehicle are shown in
the illustration.
• Bulb "a" is used for the headlight and can be
pulled out by turning counterclockwise while
pushing the bulb holder and removing. After
this, you can remove the bulb.
• Bulb "b" is used for tail/ brake lights and can
be removed from the socket by pushing and
turning the bulb counterclockwise.
• Bulb "c" is used for indicator lights and can
be removed from their respective socket by
carefully pulling them out.
Checking the condition of the bulbs
The following procedure applies to all of the
bulbs.
1. Remove:
• Bulb
Refer to "REPLACING THE HEADLIGHT
BULBS" on page 3-32.
EWA13320
WARNING
Since the headlight bulb gets extremely
hot, keep flammable products and your
ELECTRICAL COMPONENTS
hands away from the bulb until it has
cooled down.
ECA14380
• Be sure to hold the socket firmly when
removing the bulb. Never pull the lead,
otherwise it may be pulled out of the ter-
minal in the coupler.
• Avoid touching the glass part of the head-
light bulb to keep it free from oil, other-
wise the transparency of the glass, the
life of the bulb, and the luminous flux will
be adversely affected. If the headlight
bulb gets soiled, thoroughly it with a cloth
moistened with alcohol or lacquer thin-
ner.
2. Check:
• Bulb (for continuity)
(with the pocket tester)
No continuity → Replace.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
TIP
Before checking for continuity, set the pocket
tester to "0" and to the "Ω × 1" range.
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a. Connect the positive tester probe to termi-
nal "1" and the negative tester probe to ter-
minal "2", and check the continuity.
b. Connect the positive tester probe to termi-
nal "1" and the negative tester probe to ter-
minal "3", and check the continuity.
c. If either of the readings indicate no continu-
ity, replace the bulb.
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