Yamaha YSR50T Service Manual page 187

LIGHTING SYSTEM
I
ELEC
I
V
2. "LIGHTS" (Dimmer) switch
.Disconnect the handlebar switch couplers
[(Chocolate, Green, Dark green and Yellow)
(Black, Pink, YellowIRed and Brown1White)l
from the wireharness.
*Connect the Pocket Tester
( f l x 1)
to the
"LIGHTS" (Dimmer) switch leads.
When turning "LIGHTS" (Dimmer) switch
to "HI".
Tester
( + )
Lead+Yellow/Red
@
Lead
Tester
(
-
Lead-+Yellow
@
Lead
When turning "LIGHTS" (Dimmer) switch
to "LO".
Tester
(
+
Lead+Yellow/Red
@
Lead
Tester
(
-
Lead-+Green
@
Lead
*Turn the "LIGHTS" (Dimmer) switch to the
"HI" and "LO".
.Check the "LIGHTS" (Dimmer) switch for
continuity.
Switch
I
Oood
I
Bad condition
position condition
HI
0 x 0
x
LO
0 0
X X
0:
Continuity
x
: Nocontinuity
GOOD CONDITION
3. Lighting circuit output
.Turn the "LIGHTS" (Dimmer) switch to
"LO".
*Connect the Pocket Tester (AC V-20) to the
headlight leads.
- -
Tester
( + )
Lead+Green
@
Lead
Tester
( -
)
Lead+Black
@
Lead
"LIGHTS" (Dimmer) switch is faulty, replace
handlebar switch.
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