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Gramps

2000 yamaha kodiak 400 2 wd start key turns blow 10 amp fuze

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Hey folks, thanks for the add.  I purchased a 2000 kodiak a few days ago.  The seller claimed an electrical problem which he didnt care to investigate.  I thought it was going to be easy...and initially i found a blown 10 amp ignition fuse, and a blown headlight fuse... changed them and tried to start, but when I turned the key to run, the N light came on for an instant and the fuse popped...I unplugged all other connections to the wiring harness I could find, kept the ignition harness hooked up and tried again...the fuse blew again...I then disconnected the outgoing harness from the CDI and this time the with the switch turned the neutral light comes on and I can enable the start switch and hit the starter button and the motor turns but does not actually start, i can also turn on the headlights and taillight in this configuration, however, when i hook up the out going side of the CDI, and turn the key, the fuse blows....HELP?  any ideas to get her running?  I have not removed the gas tank to look under it for frayed wires, but so far, no frayed wired.  With the input side of the CDI plugged in, and all other wiring harnessed connected the starter will turn, but engine wont turn over.  As soon as I plug in the outgoing (8 plug) harness into the CDI and turn the key, the fuse blows.   Thanks!  Gramps 

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Welcome to Quadcrazy! I would think your going to have to trace each of the 8 wires on the outgoing side to its destination and inspect for damage. If no luck finding damage or a shorted wire then try to disconnect each of the wires one at a time and see if the fuse holds.  Process of elimination here I think.  Get some extra fuses! 

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I have a 2000 big bear 400. My problem is Exactly like yours. Previous owner was riding it and it quit in mid ride. He replaced the main fuse in the fuse block and it kept blowing. I traced the wires from the switch after reading the the schematic many times. I got frame power,as you did but after replacing one fuse, smoke came from the CDI. All frame electrical circuits work fine. I’m hoping a new CDI will cure the problem, but considering the cost, I’m afraid the problem might be elsewhere causing the CDI to go bad. I was hoping I could learn on the forum how often the CDI units fail. Any help will be appreciated!  

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