Questionboth front and back will make brake lights flicker or go out when engaged all the way or too fast. the voltage drops too from 9v to abt 5 or 6v.
AnswerRamona,
(The front and rear brake each has it's own
switch, that's why I suspect the wiring, grounds,
fuse holder or brake light unit)
It goes like this, from the fuse a brown power wire
runs to both switches, then a green/yellow wire comes
from the front brake switch and combines with
a yellow wire coming from the rear brake switch.
This yellow wire goes to the tail/brake light.
The brake light unit itself is grounded, probably
a black wire.
-disconnect the brake/tail light connector and check
the voltage on the black/yellow wires coming to the light.
Key should be on and one of the brake switches on. You should
have over 12 volts.
-Your battery should read close to 14 volts
when the bike is running. Check this out too.
-Voltage should never be down to 9 or less.
If your battery is not reading 13.5-14.5 volts
your charging system may not be working.
If it checks out I suspect the brake/tail light
has problems. Check the ground wires and fuse
holders and make sure battery cables are tight.
