Yamaha YP400T Service Manual page 371

6. Voltage
• Connect the pocket tester (DC 20 V) to the
front turn signal/position light coupler, rear
turn signal/license plate light coupler or
meter assembly coupler (wire harness
side) as shown.
È Front turn signal/position light (left)
É Front turn signal/position light (right)
Ê Rear turn signal/license plate light
Ë Meter assembly
Left turn signal light
Positive tester probe → chocolate 1
Negative tester probe → ground
Right turn signal light
Positive tester probe → dark green 2
Negative tester probe → ground
È
B Ch L
B Ch L
1
Ê
Ë
1
Ch Dg Y
L
2
É
B Dg L
B Dg L
2
2 1
Ch Dg
Dg Ch
B L/R
Br B
R/W R/G G
Y/L B/L Gy B
8 - 40
SIGNALING SYSTEM
• Set the main switch to "ON".
• Set the turn signal switch to "
• Measure the voltage (DC 12 V) of the
chocolate 1 or dark green 2 at the front
turn signal/position light coupler, rear turn
signal/license plate light coupler or meter
assembly coupler (wire harness side).
• Is the voltage within specification?
YES
This circuit is OK.
4. The V-belt replacement indicator fails to
come on.
1. V-belt replacement indicator bulb and
socket
• Check the V-belt replacement indicator
bulb and socket for continuity.
• Are the V-belt replacement indicator bulb
and socket OK?
YES
– +
ELEC
" or " ".
NO
The wiring circuit
from the turn signal
switch to the front
turn signal/position
light coupler, rear
turn signal/license
plate light coupler or
meter assembly cou-
pler is faulty and
must be repaired.
NO
Replace the V-belt
replacement indica-
tor bulb, socket or
both.