No power, keeps blowing 30a fuse.

Hello im new to this site and motorcycles so bare with me. I recently bought a 91 vfr750 and started dismantling it. Before I bought it the 30amp fuse was blown so we went out and got a new one and she started right up. A few weeks later half apart I started it for a friend and it worked just as it should. So today I try to connect the battery to sort out the headlight and as soon as the battery is connected the fuse blows. Ive tryed with the ignition on, with the key out, ect and noting works. Could it be the rectifier or some bad wire? ive went through about 10 fuses haha so please tell me what you think thanks - Mike

 

That's usually indicative of a short. Most likely something somewhere is shorting to ground. When you had the bike apart did you move or remove anything that might have interfered with the wiring harness? Yes, some model VFRs are known to have R/R issues but sometimes it's just bad or poor connections that mess things up. There are a few post on the forum about melted connectors (with pics), this is due to poor connections and too much resistance causing the wiring to overheat and melt the connector.

I would take off all the body work and do a thorough visual inspection of the wiring harness and start from there. Note that a lot of the connection points are covered by a plastic shroud to help protect them, make sure you pull the shroud away and inspect the connection underneath them. I won't sugar coat this, but wiring issues are sometimes the hardest thing to deal with, mostly because there are so many connections and a lot wiring goes into these bikes, and sometimes it's hard to find where a wire or connector is touching the frame or melted to where the wires are all touching now.

If you do not have any mechanical or electrical experience, it may seem like an over daunting task and trying to trouble shoot this over the internet may take a lot longer than one would hope. Then again, you could get lucky and find the culprit right away, it's been known to happen, I found my issue when I squeezed the front brake. As soon as the brake light switched was triggered, "poof" the fuse blew, double checked the wiring at the switch and low and behold it was shorting out at the handle bar. If you have any friends who are familiar with this sort of thing, buy them dinner and a few beers and lend them hand, otherwise see if anyone here, close to you, can lend a hand for the same cost or with some other compensation ($). If you're inclined to do this yourself, grab a good multimeter, the Honda field service manual wiring diagram and some patience. Good Luck, I'm sure more people with chime in soon.

 

:welcome: to the zoo lad :wave:
Sorry about your Gremlin issue, I remember one of the member having the same issue. As Ootv have mention, look for a burn mark on the wire connect to the battery
I believe Meggot is the one have this issue, let me find his post. be patient

 

Definitely a direct short to ground, look for pinched wire on re-assembly.

 

This is what I found so far, hope Meggot will chim in shortly

http://vfrworld.com/forums/showthre...-boosted-in-parking-lot/page2?highlight=Fuses

http://vfrworld.com/forums/showthread.php/40326-Blown-fuse-Any-Ideas?highlight=Fuses

 

do an ohm test from that fuse to ground with battery disconected, then start pulling fuses till the short is gone. if it doesn't clear up that way then the short is in r\r or stator

 

Bike ran when you got it, ran half apart, then blows fuses after it is put back together. Doubt it is the regular VFR gremlins. Check everything!

 

he said it came with a blown fuse, problem was there

 

He may have disturbed a harness or bundle of wires while working on it (previous fuse) and when put back together, it popped again. Intermittent problems hard to trace.

 

he bought it with a blown fuse

 

Its got a blown R/R that is shorting the 30 amp fuse. Or his three yellow wires from stator are fried, dont know if this would cause immediate short though, where the former will eat a fuse right away.

Easy thing is both things you need to look for are on one side of the motorcycle. Good luck and keep us posted!

 

Sorry Long my issue was with the wire leading to the fuse. The fuse never blew, the bike ran fine. The red wire leading from the connecter to the fuse holder melted and turned black! I replaced the wire and the fuse seems to run slightly warm but the bike is put to bed for the winter. I will resume the search when the garage gets above 30 degrees!

 

Haha Thanks for chimp in bud, too many blow fuse thread and I thought you were the latest victim........Carry on and stay warm. Enjoy your Snow mobile

 

All this talk of blowing fuses we forgot to welcome him! Welcome to The World Mike! Maybe more help will come if you post a pic or two of your ride.

 

Thank you to everyone who has replied! I feel very special haha. Just for shits and giggles I unplugged the rectifier and put the battery in and nothing blew. As soon as I connected the rectifier, pop goes the fuse. Should I get a multimeter and test everything or buy a new rectifier? Also is the R/R that little pink box that goes over the fuse? because thats has a nice melted hole in it lol. Theres not much for photos everythings taped up

 

I think you have found the culprit. a dvm is always good to have

 

Yep, DMM is a good fun tool to have, more you spend on them, the better they are. If you get a lousy one, its almost better to just have a test light. You may wana have a better look at the starter relay as that can melt, (its near the honda think red/pink cover) its a four post deal. I knew your r/r was the culprit, you may wana cut away those toasted wires that plug into your starter relay and use crimp connectors, if you can solder them on, even better, follow with some shrink tubing.

 

All I'll say about multi-meters...if it works, it's a Fluke!

 

who was advising that company to name themselves that? ound: it is a funny name, known thoughout the world. Pretty impressive actually...

 

Im sure you all have seen this before, Not sure if it will help but that's the only burned part I see on the whole harness.