Yamaha 2004 FZ6-SS Service Manual - Elec
8-37
SIGNALING SYSTEM
ELEC
YES
NO
1. Tail / brake light bulb and socket
S Check the tail/brake light bulb and socket for
continuity.
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.
S Are the tail/brake light bulb and socket OK?
Replace the tail /
brake light bulb,
socket or both.
EAS00797
2. The tail / brake light fails to come on.
YES
NO
2. Brake light switches
S Check the brake light switches for continuity.
Refer to “CHECKING THE SWITCHES”.
S Is the brake light switch OK?
Replace the brake
light switch.
3. Voltage
S Connect the pocket tester (DC 20 V) to the
tail / brake light coupler (wire harness side)
as shown.
Negative tester probe
! black
Positive tester probe
! yellow
1
2
S Turn the main switch to “ON”.
S Pull in the brake lever or push down on the
brake pedal.
S Measure the voltage (DC 12 V) of yellow
on the tail / brake light coupler (wire harness
side).
S Is the voltage within specification?
2
YES
NO
2. Voltage
S Connect the pocket tester (DC 20 V) to the
horn connector at the horn terminal as
shown.
The wiring circuit
from the main switch
to the horn connec-
tor is faulty and must
be repaired.
Negative tester probe
! ground
Positive tester probe
! black/white
1
S Turn the main switch to “ON”.
S Push the horn switch.
S Measure the voltage (DC 12 V) of
black / white at the horn terminal.
S Is the voltage within specification?
NO
YES
3. Horn
S Disconnect the black connector at the horn
terminal.
S Connect a jumper lead to the horn termi-
nal and ground the jumper lead.
S Turn the main switch to “ON”.
S Push the horn switch.
S Does the horn sound?
The horn is OK.
1
Replace the horn.