"Generator" fuse keeps blowing. need help badly

[Boon]

Guessing it's something to do with the exciter current required by your alt. Larger alt = higher exciter current and the 20A stock circuitry can't handle it.

Maybe run a big-ass relay off that 20A circuit, power the relay with a run of 8ga fused at 60 amps?

Just what I'm theorising of course, I've never seen this issue personally.

[blackrosetiger]

if its demanding more current then it can handle then yes that wire would need to be bigger. Have you checked it with a DMM and compaired it to the stock fuses? bigger load = bigger fuse. at 3k rpm (if the pulley is smaller then stock) it should have more of a demand then with the stock so it blows sooner. (your pulley is spinning faster with a smaller pulley then it is with the stock one therefore it'll blow at lower rpms)if nothing else try sticking in a larger fuse and see what happens. I can almost guarantee that will solve your problem if it does then boon is right the circuit cant handle the load

Edited August 20, 2010 by blackrosetiger

[Mosin]

if its demanding more current then it can handle then yes that wire would need to be bigger. Have you checked it with a DMM and compaired it to the stock fuses? bigger load = bigger fuse. at 3k rpm (if the pulley is smaller then stock) it should have more of a demand then with the stock so it blows sooner. (your pulley is spinning faster with a smaller pulley then it is with the stock one therefore it'll blow at lower rpms)if nothing else try sticking in a larger fuse and see what happens. I can almost guarantee that will solve your problem

A larger fuse is only as good as the stock wire on either side of it. Boon has a great idea. But maybe your thinking the same thing. lol

[IH8PunkRok]

Guessing it's something to do with the exciter current required by your alt. Larger alt = higher exciter current and the 20A stock circuitry can't handle it.

Maybe run a big-ass relay off that 20A circuit, power the relay with a run of 8ga fused at 60 amps?

Just what I'm theorising of course, I've never seen this issue personally.

yes the exciter current is the issue

my dad seems to think your idea makes sense. i personally do not understand it but if he thinks its a good idea then so do i.

[Beanz]

if its demanding more current then it can handle then yes that wire would need to be bigger. Have you checked it with a DMM and compaired it to the stock fuses? bigger load = bigger fuse. at 3k rpm (if the pulley is smaller then stock) it should have more of a demand then with the stock so it blows sooner. (your pulley is spinning faster with a smaller pulley then it is with the stock one therefore it'll blow at lower rpms)if nothing else try sticking in a larger fuse and see what happens. I can almost guarantee that will solve your problem

of course it will cause now it will take longer for the fuse to blow since that fuse dosent get to the point where its going to blow.All he'll do is just burn up the wire.

[Soulman07]

This particular issue would definitely be one of a kind sir... I'd recommend letting an experienced electrician handle it if none of this stuff works.

It could be a number of things causing this one though.

The fuse idea is a good place to start. 30 amp is probably the largest you get out of a standard mini fuse. It wouldn't hurt to try it first.

You could also have an open wire that kind of bounces around and touches open metal when you turn the bass up so, trace all of the wires down that come off of the generator fuse to make sure that there is no cuts or splices in them.

If everything checks out clear, replace the voltage regulator inside of your alternator.

Your alternators voltage regulator should never pull so many amps that it's making fuses blow. Which is why I would doubt a fuse would actually be the problem.

After that...

Hope that one of the top three solutions fixed your issue.

If all of these fail, could be time for an alternator replacement or something inside of your cars computer could be causing it to happen.

I would check the first two then go from there. Everything else involves spending a decent amount of money to guess at it.

[IH8PunkRok]

This particular issue would definitely be one of a kind sir... I'd recommend letting an experienced electrician handle it if none of this stuff works.

It could be a number of things causing this one though.

The fuse idea is a good place to start. 30 amp is probably the largest you get out of a standard mini fuse. It wouldn't hurt to try it first.

You could also have an open wire that kind of bounces around and touches open metal when you turn the bass up so, trace all of the wires down that come off of the generator fuse to make sure that there is no cuts or splices in them.

If everything checks out clear, replace the voltage regulator inside of your alternator.

Your alternators voltage regulator should never pull so many amps that it's making fuses blow. Which is why I would doubt a fuse would actually be the problem.

After that...

Hope that one of the top three solutions fixed your issue.

If all of these fail, could be time for an alternator replacement or something inside of your cars computer could be causing it to happen.

I would check the first two then go from there. Everything else involves spending a decent amount of money to guess at it.

i need to try a larger fuse. ive traced the wire and it has no breaks that i can see. ive replaced the voltage regulator and it still happens.

im thinking it is the alternator. maybe thats why no one likes db electrical

[Soulman07]

i need to try a larger fuse. ive traced the wire and it has no breaks that i can see. ive replaced the voltage regulator and it still happens.

im thinking it is the alternator. maybe thats why no one likes db electrical

Last thing I would say is possibly a bad diode on the rectifier or a computer problem, I would lean more towards the rectifier though. Have it rebuilt with different parts from a more reputable manufacture. The casing of the alt should still be fine along with the bearings, so if they can service it for you. It should save you a penny or two.

[IH8PunkRok]

to anyone who cares i found the problem.

a piece of wire on the coil was rubbing against some metal and was arcing.

i should be getting a replacement from db.

thanks for the help guys

[MECHMAN]

Ah yes- cheap-ass DB electrical junk strikes again....