Yamaha XS750, Manual, Page: 130 / 154

6-2 Charging System, for checks of battery and
charging system. Also check fuse condition. Re-
place any "open" fuses. There are individual fuses
for various circuits (see complete Circuit Diagram).
1. Horn does not work:
a.
Check for 12V on brown wire to horn.
b. Check for good grounding of horn (pink wire)
when horn button is pressed.
"HEAD"
HEADLIGHT
CONDITION
lNDICATOR
2)Check for 12V on brown wire to flasher
relay.
3)
Replace flasher relay.
4) Replace flasher switch.
e.
Check flasher self-canceling system. (Refer to
flasher self-canceling system.)
RESERVE LIGHTING
FUNCTION
2.
Brake light does not work:
a.
Check bulb.
b. Check for 12V on yellow wire to brake light.
c. Check for 12V on brown wire to each brake
light switch (front brake' and rear brake
switches).
Low beam faulty Comes
on
3.
Tail light does not work:
a. Check bulb.
b. Check for 12V on blue wire.
c. Check for ground on black wire to tail/brake
light assembly.
High beam comes
on
at
low brilliance
4.
Flasher light(s) do not work:
a.
Check bulb.
b.
Right circuit:
1) Check for 12V on dark green wire to light.
2) Check for ground on black wire to light
assemb I y.
c. Left circuit:
1) Check for 12V on dark brown wire to light.
2)Check for ground on black wire
to
light
assembly.
d. Right and left circuits do not work:
1)Check for 12V on brown/white wire to
flasher
switch on
left
handlebar.
5.
Neutral light does not work:
a.
Check bulb.
b. Check for 12V on sky blue wire to neutral
switch.
c.
Replace neutral switch.
6.
Oil pressure light does not work:
a.
Connect oil pressure switch (black/red wire)
to ground.
If light comes on, check for proper
oil pressure.
b.
If
oil pressure is correct, replace oil pressure
switch.
B. Reserve Lighting System
1. Description:
The reserve lighting system has two functions:
(1) I t notifies the rider that one of the head
lamp filaments i s inoperative, and (2) it
switches current from the inoperative filament
to the remaining functional filament.
The system
is
connected to the headlight cir-
cuit only. The reserve lighting system unit
is
located under the fuel tank.
*Comes
on
(very dim)
Normal
I
High beam faulty Comes on Low beam comes on