Sym MB10A7-A series Service Manual page 205

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12. Electrical System
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Brake switch
Rear brake switch
While grasp the brake lever firmly, the
terminals of black and green/yellow of the
brake should have continuity.
Replace the switch if damaged.
Front brake switch
Horn
Coupler
Disconnect the coupler and remove the horn
(1 bolt).
1 bolt
Remove the front cover and front under
spoiler.
Apply 12 V power source to two terminals of
the horn, the horn should make sound.
Replace the horn if necessary.
Adjust the quality of sound by turning the
adjusting screw.
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