Horn Does Not Sound; Backup Buzzer Does Not Sound - Sakai R2-4 Shop Manual

2-6-20. Horn does not sound

Reference Fig.: 2-6-4
Check point
1. Horn
2. Horn Relay
3. Horn Switch
4. Harness Connecting
Between Terminals

2-6-21. Backup buzzer does not sound

Reference Fig.: 2-6-4
Check point
1. Backup Buzzer
2. Backup Buzzer Switch
3. Harness Connecting
Between Terminals
Check/Cause
• Disconnect horn and directly connect battery positive
terminal to horn terminal wire GY side and negative
terminal to horn terminal chassis ground side.
• If horn does not sound, horn is faulty.
(1) when starter switch is ON, measure voltage between
horn relay terminal 1 inlet wire Gr and chassis ground.
Standard voltage : 12 V or more
(2) when starter switch is ON, measure voltage between
horn relay terminal 3 inlet wire Gr and chassis ground.
Standard voltage : 12 V or more
(3) when starter switch is ON and horn switch pressed,
measure voltage between horn relay terminal 5 outlet
wire GY and chassis ground.
Standard voltage : 12 V or more
• If above items (1) and (2) are OK and item (3) is NG, horn
relay is faulty.
• 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.
• Measure resistance of harness connecting between
terminals.
Standard resistance : 10 Ω or less
• If resistance is abnormal, harness is faulty.
Check/Cause
• Disconnect backup buzzer and directly connect battery
positive terminal to backup buzzer terminal wire RY side
and negative terminal to backup buzzer terminal chassis
ground side.
• If backup buzzer does not sound, backup buzzer is faulty.
(1) when starter switch is ON, measure voltage between
backup buzzer switch terminal COM inlet wire wB 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 NO outlet wire RY 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.
• Measure resistance of harness connecting between
terminals.
Standard resistance : 10 Ω or less
• If resistance is abnormal, harness is faulty.
TROUBLESHOOTING
Action
Replace horn.
Replace horn relay.
Replace horn switch.
Repair or replace
harness.
Action
Replace backup buzzer.
Replace backup buzzer
switch.
Repair or replace
harness.
10-065