hello, I have a 2001 scarmbler 500 HO 2x4 that does not start when the key is turned. The lights come on, neutral indicator does too. There is no noise or anything when the key is turned. The quad starts right up with the pull start. Wires all seem to be connected. Where should I begin looking to try to fix this problem? I do not have a manual or anything. Thanks for your help.