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2008 Sportsman 500 EFI w/ key on, no lights/ won’t start… has new battery? Need help

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My 2008 sportsman 500 EFI won’t show any signs of starting. I have replaced the battery, when I turn the key on…nothing, just like a dead battery? Any suggestions what could be wrong?


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Check and trace the wires going to your key switch. Check the ground at negative side of the battery. I'm sure more people will have more ideas... Welcome to the site.

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Electrical switches don't work when the contacts get too dirty. I can't tell you how many times I have fixed someones power windows or lights/blinkers just by taking the switch apart and cleaning the contacts inside. If all the wiring seems ok, and power is getting to the key switch, but not coming out of it, try taking it apart and cleaning it up, or, just replace it. If power is coming out of the switch, check for power on the low current trigger wire at the solenoid. If there is power, the problem lies in the starter or solenoid. If there isn't power, then the problem is in the wire between the solenoid and the key switch. Good luck.

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I'm not exactly sure but I belive that I read somewhere that the EFI models have a circuit breaker under the seat somewhere. I think it`s also wraped up in rubber or plastic.

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They could be under the hood too. Sometimes the protective wrapping gets water inside and corrodes the hell out of them. I belive there are three of them, 2 run the electrical system and the third one works the 12 acc plug.

They look like this...


20 amp breaker goes to the ignition switch and the other 20 amp breaker to the fan switch.


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