Checking The Condition Of The Bulb Sockets; Checking The Leds - Yamaha 2004 YP400 Service Manual

CHECKING THE BULBS AND BULB SOCKETS
Ch Dg Y R/W R/G G
G/L L Y/L B/L Gy
1
CHECKING THE CONDITION OF THE BULB
SOCKETS
The following procedure applies to all of the
bulb sockets.
1. Check:
• bulb socket (for continuity)
NOTE:
_
Check each bulb socket for continuity in the
same manner as described in the bulb section;
however, note the following.
M MMM
a. Install a good bulb into the bulb socket.
b. Connect the pocket tester probes to the
c. Check the bulb socket for continuity. If any
L LLL

CHECKING THE LEDs

The following procedure applies to all of the
LEDs.
1. Check:
• LED (for proper operation)
M MMM
a. Connect the pocket tester (DC 20 V) to the
B
Positive tester probe → green/blue 1
Negative tester probe → black 2
2
b. Turn the main switch to "ON".
c. Measure the immobilizer indicator light volt-
L LLL
8 - 7
(with the pocket tester)
No continuity → Replace.
Pocket tester
90890-03112, YU-03112-C
M MMM M M MMM M M MMM M
respective leads of the bulb socket.
of the readings indicate no continuity,
replace the bulb socket.
L LLL L L LLL L L LLL L
M MMM M M MMM M M MMM M
meter coupler as shown.
age.
Immobilizer indicator light volt-
age
2.6 V
Out of specification → Replace the meter
assembly.
L LLL L L LLL L L LLL L
– +
ELEC
M MMM M M MMM M MMM
L LLL L L LLL L LLL
M MMM M M MMM M MMM
L LLL L L LLL L LLL