• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

blowing main fuse

  • Thread starter Thread starter Anonymous
  • Start date Start date
A

Anonymous

Guest
neighbour has an '83 GS750ES that as he tells me is NOT the katana. anyway recently it started blowing the main fuse about 5seconds after shutting it off. im not sure if he shuts it down with the key or the kill switch though.

edit: guess it helps if anyone has any thoughts where to look for probs?
 
Re: blowing main fuse

I'll just throw this out there, that when my '78 was blowing its fuse it turned out to be a bad ground, so the electricity had nowhere to go. The battery ground (negative) had corroded and because of my new rectifier regulator, which was putting out voltage the bike hadn't seen in 25 years, there was excess resistance. Problem was solved by adding another ground to the battery negative terminal.

I would have renewed the original ground but it roots itself in the crankcase. I ended up using one of the engine mount bolts.
 
I think I remember this problem being posted before... I'm sure it's long gone by now.

If a fuse blows over and over again, the obvious problem is a short circuit. Another less obvious problem is a charging system problem, such as too high voltage.

Just some thoughts. Good luck.
 
yah thats what I figured. just confuses the hell out of us that it blows AFTER shutting it off
 
crazyguy said:
yah thats what I figured. just confuses the hell out of us that it blows AFTER shutting it off
Click to expand...

Bad ground on the kill switch, I bet. It likely arcs across some corrosion, raising voltage too high. Poof
 
crazyguy said:
yah thats what I figured. just confuses the hell out of us that it blows AFTER shutting it off
Click to expand...

he has a bad rectifier!!!
the rectifiers allow the power coming from the stator to only go one way as well as converting the AC current that is produced to DC current, if one or more of the rectifiers goes bad, it will allow battery power to return back down through the regulator rectifier to the stator just like a short.

the fuse will hold with it running because the stator is producing power.

often when a rectifier fails they don't blow the fuse, they just run the battery dead over night, he more than likely has more than one of the rectifiers in the R/R bad.
one thing that will also point to a bad rectifier is the lights, with a bad rectifier on a running bike (and cars too!) you will notice a waver, or flicker in the lights, mainly low wattage bulbs like the tail light and dash lights with the engine at idle.
 
thats actually what we were discussing tonight. his battery suddenly went flat dead on him while riding the day and he had to push start it to get home again. i'll inform him of the crappy news then go check my little brothers GS850 parts bike has the same reg/rect.
 
Do a bit of preventive maintenance too. Clean the contacts in your fusebox, and make sure the clips have enough tension to hold the fuses securely. Dealer told me about this. Said it was a big problem with some of the old bikes because folks don't think to check these connections.
 
You must log in or register to reply here.
Back
Top