Amp Fuse keeps blowing
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=34298
Printed Date: July 07, 2025 at 12:09 AM
Topic: Amp Fuse keeps blowing
Posted By: chrisdotnet
Subject: Amp Fuse keeps blowing
Date Posted: June 21, 2004 at 12:42 PM
HI i need help my amp was working fine for the longest time then one day the amp fuse bloew (the fuse that goes in the amp) and i went out and baught some more and even when the car is off and i go to put it in it will blow the fuse, it blows the fuse no matter what i do what do u think is wrong?
Replies:
Posted By: customsuburb
Date Posted: June 21, 2004 at 12:44 PM
Make sure the power and ground wires arn't touching each other, and that the power wire isn't touching bare metal. It could also mean your amp's life is over. What is the model?
Posted By: kgerry
Date Posted: June 21, 2004 at 12:45 PM
blown FETs in the power supply if the fuse blows as soon as you put it in... blown outputs if the fuse only blows when you remote the amp on.... both scenarios, you've got a problem in the amp..... ------------- Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: chrisdotnet
Date Posted: June 21, 2004 at 12:51 PM
The cables are not touching, not touching bare metal either, So how much do you think it will cost to fix it is it even worth it it's only a 240 watt pioneer amp i got it for free but. how much to fix
Posted By: DYohn
Date Posted: June 21, 2004 at 1:02 PM
How much to fix? More than it's worth, sorry. ------------- Support the12volt.com
Posted By: chrisdotnet
Date Posted: June 21, 2004 at 1:17 PM
Ok i jus twent out an dmessed with it a bit it only blows when i connect the ground wire.
Posted By: forbidden
Date Posted: June 21, 2004 at 1:23 PM
SAS - smelly amplifier syndrome. It sounds like blown outputs or a toasted power supply.
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Top Secret, I can tell you but then my wife will kill me.
Posted By: kgerry
Date Posted: June 21, 2004 at 1:46 PM
why are you pi**ing around with the ground wire??... the FIRST thing that should be hooked up is the ground wire....an active power supply will search for ground ANYWHERE it can find it.... and god forbid you've got your RCA cables plugged in.....you just roasted most of the ground foils in the HU's audio circuit....leave the ground hooked up and dont play with it.... i service half a dozen power amps every day... read the above posts if you want to try and narrow your problem down.... or do you just want 30 similar opinions? you remind me of all my customers that come in here and say " i've been to 5 or 6 different places and they all told me to come here " it's like they needed to hear it enough times ( or from enough different people ) that it finally sinks in....... ------------- Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: Ravendarat
Date Posted: June 21, 2004 at 2:50 PM
You sound frustrated Kevin :)
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double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: DYohn
Date Posted: June 21, 2004 at 2:53 PM
Ah1 You beat me to it. I was about to reply "How can it blow when you connect your ground wire unless you have the power conencted first which is a BIG mistake." Thanks! ------------- Support the12volt.com
Posted By: kgerry
Date Posted: June 21, 2004 at 3:57 PM
yah... i have been know to PMS without my daily coffee ( or beer ) sorry
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: chrisdotnet
Date Posted: June 22, 2004 at 1:11 PM
Well i know that Kevin but STILL even if i have the ground PLUGGED IN and then go to hook the power up it BLOWS THE FUSE!
Posted By: forbidden
Date Posted: June 22, 2004 at 1:34 PM
This is because there is a dead short inside of the amplifier, it has nothing to do with your wiring. The amp needs to go to the old Pioneer home in the sky or if you prefer, a service shop. More than likely it is not worth fixing. We all have bad days, sounds like someone who was trying to help you was having one of those, don't mind it, Kevin is extremely helpful. I get that way sometimes as well, but I usually can take it out on my staff with a chain or on Monday nights at road hockey or Tuesday at volleyball. Mind you I nailed a hot chick really bad last week, bought her supper later on, things are looking up......
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Top Secret, I can tell you but then my wife will kill me.
Posted By: kgerry
Date Posted: June 22, 2004 at 2:39 PM
Does the fuse blow as soon as you plug it in or only when you remote the amp on?? blown FETs in the power supply if the fuse blows as soon as you put it in... blown outputs if the fuse only blows when you remote the amp on.... both scenarios, you've got a problem in the amp.... i wont speculate on whether it's worth fixing or not, but it's probably worth springing the diagnostic charge to have a qualified service shop at least look at it...... ------------- Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
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