Blowing ignition fuse when turned on.

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Blowing ignition fuse when turned on.

Postby buckdaily » Fri Jul 10, 2015 5:51 pm

My son has a 2007 YZF600R and a couple of weeks ago he ran out of gas. After putting gas in it he also found that the battery was bad and decided to jump start the bike and in the process he blew the 7.5 ignition fuse. This is when I got involved, installed a new battery and the fuse continues to blow when the ignition is switched on. My next step thinking he burned a wire was replacing the wiring harness. Same results, we had a spare computer brain and that didn't work either. Does anyone have an idea what it maybe, I appreciate your help.. Thanks

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Re: Blowing ignition fuse when turned on.

Postby 01YZF6 » Sat Jul 11, 2015 6:40 am

Bad ground wire somewhere
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Re: Blowing ignition fuse when turned on.

Postby tuning-forks » Sat Jul 11, 2015 1:41 pm

If the wiring harness you replaced contains all the wires running off that fuse, then that should eliminate any wiring shorts to chassis. I guess a short to ground in the kill switch is still a possibility.
The electrical diagram I have shows only 4 things running off that fuse, the 2 coils, the fuel pump relay, and the start circuit cut-out relay.
I would disconnect all 4 items, check if fuse blows at power up, if so, it's wiring or kill switch.
If fuse is good, reconnect those 4 items one at a time, power up after connecting each. When the fuse blows you will have found the culprit.
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