Yamaha VMX12H Supplementary Service Manual page 338

LIGHTING SYSTEM
.
Taillight Troubleshooting
TAILLIGHT DOES NOT COME ON WHEN ENGINE IS RUNNING.
Check taillight bulb.
Check main fuse.
I
t
Measure voltage on Blue lead from main
switch ("ON" position).
Measure voltage a t taillight terminal,
Poor ground or poor connection
wiring.
7-35
Faulty
Faulty
I
Novoltaae
12v
No voltage
of taillight
Replace.
Replace.
Check main switch, replace if necessary.
-
An open or poor connection between taillight
and main switch terminal.
I
I