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JJ78

Yamaha Big Bear 400 No power when turn key on

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I have a yamaha big bear 400, tested all fuses and relays. When I turn on key I get nothing, no neutral light or headlights. Could it be the key switch bad?

 

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Could be.  Did you check the battery for 12 volts? 

If battery is OK, then remove seat and see if the battery relay (the cylindrical thing next to the battery) clicks when you turn the key, and/or test for 12 volts on the output side of the relay.

Check for 12volts at the key switch harness connector.

 

 

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I have had the switches go bad numerous times on old motorcycles.  If the battery tests good you can unplug the ignition switch and just 2 of the connections.  You should get power with some combination. They you know its the switch.

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