Checking The Signaling System - Yamaha MIO Service Manual

EAS00795
4. Wiring
• Check the entire signal system's wiring.
Refer to "CIRCUIT DIAGRAM".
• Is the signaling system's wiring properly
connected and without defects?
YES
Check the condition
of each of the signal-
ing system's circuits.
Refer to "CHECK-
ING THE SIGNAL-
ING SYSTEM".
NO
Properly connect or
repair the signaling
system's wiring.
SIGNALING SYSTEM
EAS00796

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?
2. Voltage
• Connect the pocket tester (DC 20 V) to the
horn connector at the horn terminal as
shown.
Positive tester probe → brown 1
Negative tester probe → ground
1
• Set the main switch to "ON".
• Push the horn switch.
• Measure the voltage (DC 12 V) of brown at
the horn terminal.
• Is the voltage within specification?
7 - 36
ELEC
YES
The horn switch is
faulty. Replace the
left handlebar switch.
Br P
YES
The wiring
from the main switch
to the horn connector
is faulty and must be
repaired.
– +
NO
NO
circuit