HELP - Main fuse fiasco

[BAB]

I just bought an 05 1500 EFI. Rode for about 12 minutes and the main 30 amp fuse blew.
Changed it out checked the battery, ground, reg/rec all good. The main blows after twelve minutes every time whether riding or idling.....it seems to blow when hitting the throttle....any ideas about this would be appreciated.....could faulty Cold Idle Solenoids cause it to short out??

Regards, BAB

[sfair]

Any electrical add-ons...grips, light bar, etc.?
No, the idle solenoids will not blow the main fuse.

[Bigjoe]

I see some driving lights on there. Do they come on with idle (like the headlight)? or with key? If somebody replaced those 35 watt bulbs with some 55W, that could be the problem.. The 35 watters are hard to find, but the 55 watters are available everywhere..

[BAB]

Hi guys, thanks for the feedback....yes the running lights are an add on and have a separate toggle on the one light for on off. No other add ons but for the pipes. The fuse does not blow intermittently, just the same amount of time (12 to 15 minutes) so it seems more like a part failing due to possibly overheating more than a dead short.....I have got the bike in with my mechanic but he is as stumped as I am at this point. Seems also that if you hit the throttle around the twelve minute mark out goes the fuse....we wired in a 30 amp relay so as not to keep changing fuses.

The sun is shining and the road is long...
But something with me bike is wrong....

[reddyford]

Originally Posted by BAB

we wired in a 30 amp relay so as not to keep changing fuses.

Do you mean a 30 Amp Circuit Breaker?? Sounds like the Rect/Reg is failing. Someone will chime in to help check it out.

[Easy Rider]

Originally Posted by reddyford

Sounds like the Rect/Reg is failing. Someone will chime in to help check it out.

That gets my vote. It's one of a VERY few things except for a pinched wire that can get the main fuse.....because it doesn't have a fuse of it's own.

Regulators are tricky to test, especially when there is an intermittant problem.
I'd suggest charging the battery fully and then disconnecting the regulator completely and see what happens around the 12 minute mark.

[BAB]

Yes reddyford I meant a 30 amp circuit breaker. The rec/reg was my vote but I never did disconnect it as I took the bike to my mechanic....he tells me the rec/reg is okay but I will check with him to see if he did disconnect it Rider...thanks guys.

[Easy Rider]

Originally Posted by BAB

..he tells me the rec/reg is okay but I will check with him to see if he did disconnect it Rider...thanks guys.

Unless and until he finds something ELSE causing the problem, he can't say for sure that it is NOT the R/R.

[PatC]

Main fuse issues can be maddening. I was all packed up for a trip last summer with another couple. Halfway to their house 40 miles away, the bike blew the main. I didn't know what it was at the time so we had it towed and scrapped the bike trip. I took it to a shop, they said it was my DIY driving light harness installation. They rewired it, taped it all up, sent me on my way. Three weeks later, did it again on the freeway- just like someone shut it off at 75 MPH. I swapped out the fuse and took it home. I ordered a new wiring harness with a relay and installed it. When I was hooking it up to the battery, I noticed a black spot on the seat pan right over the positive battery terminal and that the rubber cover on the battery terminal had come off. I wondered if it was arcing the battery on the seat pan at random times. I put the cover back on and taped it down with electrical tape and rode all summer with no issues whatsoever.

Not saying that's your problem but I am saying that there are few things that can blow your main fuse that don't have their own circuit protection.

[Davego]

Need to ckeck rotor in alternator.Sounds like what we call a slinging short.Try disconect charging system and run it.Some warning lights will be on but it should run.Speed it up and down see if it still blows fuse.If not then have alt.pulled and checked.Hope you find it soon.I know you want to be rideing not working on it.Good luck.Have a great ride.