Sakai TW504 - Horn Does Not Sound; Backup Buzzer Does Not Sound

10-072
TROUBLESHOOTING
2-6-21. Horn does not sound
Reference Fig. : 2-6-6
Check point Check/Cause Action
1. Horn Disconnect horn and directly connect battery positive
terminal to horn terminal wire Lg side and negative
terminal to horn terminal chassis ground side.
If horn does not sound, horn is faulty.
•
•
Replace horn.
2. Horn Relay (1) When starter switch is ON, measure voltage between
horn relay terminal 1 and 3 inlet wire RG and chassis
ground.
Standard voltage : 12 V or more
(2) When starter switch is ON and horn switch pressed,
measure voltage between horn relay terminal 5 outlet
wire Lg and chassis ground.
Standard voltage : 12 V or more
If above item (1) is OK and item (2) is NG, horn relay is
faulty.
•
Replace horn relay.
3. Horn Switch When horn switch is ON, check continuity between horn
switch terminals.
There is continuity in normal condition.
If there is no continuity, horn switch is faulty.
•
•
Replace horn switch.
4. Harness Connecting
Between Terminals
Measure resistance of harness connecting between
terminals.
Standard resistance : 10 Ω or less
If resistance is abnormal, harness is faulty.
•
•
Repair or replace
harness.
2-6-22. Backup buzzer does not sound
Reference Fig. : 2-6-6
Check point Check/Cause Action
1. Backup Buzzer Disconnect backup buzzer and directly connect battery
positive terminal to backup buzzer terminal wire BY side
and negative terminal to backup buzzer terminal wire B
side.
If backup buzzer does not sound, backup buzzer is faulty.
•
•
Replace backup buzzer.
2. Backup Buzzer Switch (1) When starter switch is ON, measure voltage between
backup buzzer switch terminal inlet wire RG and
chassis ground.
Standard voltage : 12 V or more
(2) When starter switch is ON and F-R lever is “R” ,
measure voltage between backup buzzer switch
terminal outlet wire Br and chassis ground.
Standard voltage : 12 V or more
If above item (1) is OK and item (2) is NG, backup buzzer
switch is faulty.
•
Replace backup buzzer
switch.
3. Harness Connecting
Between Terminals
Measure resistance of harness connecting between
terminals.
Standard resistance : 10 Ω or less
If resistance is abnormal, harness is faulty.
•
•
Repair or replace
harness.