Yamaha YFM660FS Grizzly 4x4 Supplementary Service Manual page 459

9.Horn does not sound. (for Europe and Oce-
ania)
1.Horn switch
Refer to "CHECKING THE SWITCH".
2.Voltage
Connect the pocket tester (DC 20 V) to the
G
horn connector at the horn terminal.
Tester (+) lead → Pink lead
Tester (–) lead → Frame ground
Turn the main switch to "ON".
G
Push the horn switch.
G
Check for voltage (12 V) on the "Pink" lead
G
at the horn terminal.
3.Horn
Disconnect the black lead at the horn termi-
G
nal.
Connect a jumper lead
G
nal and ground the jumper lead.
Turn the main switch to "ON".
G
*
CORRECT
MEETS
SPECIFICATION
to the horn termi-
HORN IS NOT
SOUNDED
9 - 45
SIGNAL SYSTEM
INCORRECT
Replace horn switch.
OUT OF SPECIFICATION
The wiring circuit from the main switch to the
bulb socket connector is faulty, repair it.
HORN IS SOUNDED
Horn is good.
– +
ELEC