Signal System Check - Yamaha YW50AP Service Manual

YP806020

SIGNAL SYSTEM CHECK

1. If the horn fails to sound.
1. HORN switch
Refer to "CHECKING SWITCHES" section.
2. Voltage
8 Connect the pocket tester (DC20V) to the
horn lead.
Tester (+) lead→Brown terminal 1.
Tester (-) lead→Frame ground
8 Turn the main switch to on.
8 Check for voltage (12V) on the "Brown"
lead at the horn terminal.
3. Horn
8 Connect the pocket tester (DC20V) to the
horn at the "Pink" terminal.
Tester (+) lead→Pink 1 terminal.
Tester (-) lead→Frame ground
8 Turn the main switch to on.
8 Check for voltage on the "Pink" lead at
the horn terminal.
Adjust or replace horn.
CONTINUITY
MEETS
SPECIFICATION
CONTINUITY
7-36
SIGNAL SYSTEM
NO CONTINUITY
Replace the left handlebar switch.
OUT OF SPECIFICATION
The wiring circuit from the main switch to the
horn is faulty. Repair.
Br P
NO CONTINUITY
Replace the horn.
– +
ELEC
Br P