Yamaha 2004 YP400, Service Manual, Page: 351 / 417

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ELEC
CHECKING THE BULBS AND BULB SOCKETS
CHECKING THE CONDITION OF THE BULB
SOCKETS
The following procedure applies to all of the
bulb sockets.
1. Check:
• bulb socket (for continuity)
(with the pocket tester)
No continuity
→
Replace.
NOTE:
_
Check each bulb socket for continuity in the
same manner as described in the bulb section;
however, note the following.
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a. Install a good bulb into the bulb socket.
b. Connect the pocket tester probes to the
respective leads of the bulb socket.
c. Check the bulb socket for continuity. If any
of the readings indicate no continuity,
replace the bulb socket.
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CHECKING THE LEDs
The following procedure applies to all of the
LEDs.
1. Check:
• LED (for proper operation)
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a. Connect the pocket tester (DC 20 V) to the
meter coupler as shown.
b. Turn the main switch to “ON”.
c. Measure the immobilizer indicator light volt-
age.
Out of specification
→
Replace the meter
assembly.
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Pocket tester
90890-03112, YU-03112-C
Positive tester probe
→
green/blue
1
Negative tester probe
→
black
2
Immobilizer indicator light volt-
age
2.6 V
G / L L Y / L B / L Gy B
Ch Dg Y R / W R / G G
2 1