E-TON EV3 E-MO Service Manual page 68

SIGNALING SYSTEM
CHECKING THE SIGNALING SYSTEM
1. The horn fails to sound.
1. Horn switch
• Check the horn switch for continuity.
Refer to "CHECKING THE SWITCHES".
• Is the horn switch OK?
YES
Replace the left
handlebar switch.
2. Voltage
• Connect the pocket tester (DC 20 V) to the
horn connector at the horn terminal as
shown.
Positive tester probe
Negative tester probe
• Set the main switch to "ON".
• Measure the voltage (DC 12 V) of brown at
the horn terminal.
• Is the voltage within specification?
YES
The wiring circuit from
the main switch to the
horn connector is faulty
and must be repaired.
NO
red/white
ground
L/Y
R/W
NO
6-12
3. Horn
• Disconnect the blue/yellow connector at
the horn terminal.
• Connect a jumper lead
terminal and ground the jumper lead.
• Set the main switch to "ON".
• Does the horn sound?
L/Y
R/W
YES
4. Voltage
• Connect the pocket tester (DC 20 V) to the
horn connectors as shown.
Positive tester probe
Negative tester probe
R/W L/Y
• Set the main switch to "ON". Push horn
switch
• Measure the voltage (DC 12V) of blue/yellow
at the horn terminal.
• Is the voltage within specification?
YES
This circuit is OK.
–
ELEC
to the horn
NO
Replace the horn.
red/white
ground
NO
The wiring circuit or
horn switch is faulty
and must be repai-
red.
+