Yamaha VK540EF, Service Manual, Page: 336 / 439

7-10
LIGHTING SYSTEM
ELEC
a
b
c
WARNING
1
1
2
3
a
b
BULB(S)
1. Remove:
S
Headlight bulb
a
S
Tail / brake light bulb b
S
Meter light bulb
c
2. Connect:
S
Pocket tester
(to the bulb terminals)
Keep flammable products and your hands
away from the bulb while it is on; it will be
hot. Do not touch the bulb until it cools
down.
3. Check:
S
Bulb(s)
Terminal Continuity
– Yes
– Yes
HEADLIGHT BEAM SWITCH
1. Disconnect:
S
Headlight beam switch coupler
2. Connect:
S
Pocket tester
(to the headlight beam switch coupler)
3. Check:
S
Headlight beam switch continuity
Faulty
Replace.
Switch position Continuity Continuity
HI No Yes
LO Yes No
LIGHTING COIL
1. Measure:
S
Lighting coil resistance
Out of specification
Replace.
Lighting coil resistance:
(Yellow – Black)
0.3
Ω ±
20% at 20
_
(68
_
F)