Yamaha YFM660RN Service Manual page 310

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3.Main switch
Refer to "CHECKING THE SWITCH".
EB806011
4.Wiring connections
Check the connections of the entire signal
system.
Refer to "CIRCUIT DIAGRAM".
Check the condition of each of the signal sys-
tem's circuits.
Refer to "CHECKING THE SIGNAL SYS-
TEM".
C0NTINUITY
CORRECT
CORRECT
8 - 29
SIGNAL SYSTEM
INCORRECT
Replace the main switch.
POOR CONNECTION
Properly connect the signal system.
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ELEC