blowing fuses as i plug them in.....

[jgarcia9102 10+ year member]

this is probably stupid, but i have gone through 9 fuses so far, and i only have one left, and i cant figure out why this is happening.

my amp was working fine, but i replaced my HU, and i noticed a blown fuse on my amp as i was installing it. i went to replace it, and it shorted the second i touched it to the slot. then i figured, oops, my ground is still connected. i un plugged that, plugged in my fuse, then the second i plugged in the ground, shorted again.

ive tried dis connecting my fuse at the battery, the amp, and where its on the chassis. i also have disconnected the positive wire at the amp, battery, and fuse.

i have one fuse left, and im not blowing this one. what do i have to do to put it in correctly?

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[937DYTBOI 5,000+ posts]

i had this happen to me before also, forgot what i did to correct it

 

[jgarcia9102 10+ year member]

lol. that helps....

 

[Pyro_By_Nature 5,000+ posts]

If you're blowing the fuse on the amp as soon as you put one in, chances are you have a blown transistor in the power supply of the amp. //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 

[Prowler573 5,000+ posts]

1st thing that comes to my mind if you're blowing fuses as soon as you attach them and you've stated that you disconnected the hot wire from the amp entirely is that you've got a short to ground somewhere on that power cable. Check where it goes through any metal (example - where it comes through the firewall to go from underhood to inside the vehicle) to see if the insulation has become compromised somewhere. If any of that cable is bared and touching metal anywhere then it'll pop fuses as fast as you can change them.

Edit: Okay - I didn't read well enough that it was the amp's fuse and not in the power cable.

In that case I'd have to say that most likely Mountaineer Man probably has it right.

 

[jgarcia9102 10+ year member]

no way. i just got this amp off of ebay, and it was working fine.. some one is gonna die

 

[jgarcia9102 10+ year member]

1st thing that comes to my mind if you're blowing fuses as soon as you attach them and you've stated that you disconnected the hot wire from the amp entirely is that you've got a short to ground somewhere on that power cable. Check where it goes through any metal (example - where it comes through the firewall to go from underhood to inside the vehicle) to see if the insulation has become compromised somewhere. If any of that cable is bared and touching metal anywhere then it'll pop fuses as fast as you can change them.

i blow the fuse once i try to connect whatever point i disconnected. like, i unplug positive at the fuse, put in the fuse on the amp, and when i go to plug in the main fuse again, there is an arc at that point, and a pop at the one on the amp, which is it blowing, obviously

 

[Pyro_By_Nature 5,000+ posts]

I had an amp for over 2 years working fine.I take it out and I tested it one last time before putting it in storage.After about 5 months I needed it again and I installed it, somehow one of them just decided to take a crap.

 

[Pyro_By_Nature 5,000+ posts]

There will be sparks at whatever point you connect it.For example I did all my hook-ups and I re-connected the negative battery terminal and there were a lot of sparks.I've seen this happen many times //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 

[jgarcia9102 10+ year member]

so is it definately the transistor? i know some one who could fix it, if necesary, but id love to hear that it could be something else...

 

[forbidden 10+ year member]

The amp is FUBAR, no doubt. It is a internal failure in the power supply section by the sounds of it that may have been caused by a bad ground.

 

[Pyro_By_Nature 5,000+ posts]

Going by your description I'd say most definently.

 

[jgarcia9102 10+ year member]

well i unplugged the amp, and now im running off my HU as crappy as that is.

Im gonna bring to my friend whos an electrical engeneer, he fixed a guitar amp of mine once for the cost of the part, so im sure he wouldnt mind fixing this. sucks i have to put more money into it...

 

[hcoronado 10+ year member]

this is probably stupid, but i have gone through 9 fuses so far, and i only have one left, and i cant figure out why this is happening.
my amp was working fine, but i replaced my HU, and i noticed a blown fuse on my amp as i was installing it. i went to replace it, and it shorted the second i touched it to the slot. then i figured, oops, my ground is still connected. i un plugged that, plugged in my fuse, then the second i plugged in the ground, shorted again.

ive tried dis connecting my fuse at the battery, the amp, and where its on the chassis. i also have disconnected the positive wire at the amp, battery, and fuse.

i have one fuse left, and im not blowing this one. what do i have to do to put it in correctly?

was the fuse blown before you replace the HU?

have you tripple check all the wiring from HU to the amp?

 

[jgarcia9102 10+ year member]

the fuse was blown before i hooked the new HU up.