E-TON EV3 E-MO Service Manual page 65

LIGHTING SYSTEM
CHECKING THE LIGHTING SYSTEM
1. The headlight fail to come on.
1. Headlight bulb and socket
• Check the headlight bulb and socket for
continuity.
Refer to "CHECKING THE BULBS AND
BULB SOCKETS"
• Are the headlight bulb and socket OK?
YES
Replace the headlight
bulb, socket or both.
2. Voltage
• Connect the pocket tester (DC 20 V) to the
headlight couplers as shown.
Positive tester probe
Negative tester probe
2
• Set the main switch to "ON".
• Measure the voltage (DC 12 V) on the
headlight coupler (wire harness side).
• Is the voltage within specification?
YES
This circuit is OK.
NO
red/white
1
brown/yellow
2
R/W Br/Y
1
Br/Y R/W
NO
Wiring circuit from
the main switch to
the headlight light
coupler is faulty and
must be repaired.
3. The tail/brake light fails to come on.
1. Tail/brake light bulb and socket
• Check the tail/brake light bulb and socket
for continuity.
Refer to "CHECKING THE BULBS AND
BULB SOCKETS"
• Are the tail/brake light bulb and socket OK?
YES
2. Voltage
• Connect the pocket tester (DC 20 V) to the
tail/brake light coupler (wire harness side)
as shown.
Positive tester probe
Negative tester probe
R/W
• Set the main switch to "ON".
•Measure the voltage (DC12V) on the
tail/brake light coupler (tail/brake light
side).
• Is the voltage within specification?
YES
This circuit is OK.
6-9
ELEC
NO
Replace the
tail/brake light bulb,
socket or both.
red/white
brown/yellow
2
Br/Y
R/W
G/Y
NO
Wiring circuit from
the main switch to
the tail/brake light
coupler is faulty and
must be repaired.
– +
1
2
1