Stereo electrical issue

[Gianni]

Car : cc coupe
Problem: 4 channel amp both fuses blow.
Was working fine for last few years. Last weekend I put the glxi electrical and interior lOoms in to replace the carby ones. This weekend I decided to hook up the head unit.

Head unit works fine now. Sub runs fine aswell. But speakers weren't working. I made sure I had them plugged in and they were.
Eventually foun the fuses blown. Replaced them and they blew straight away.
Checked the power from boot battery. Cable is fine an the power cable fuse is still good. Checked remote wire and no issues. Plus it's still running the sub amp fine.

I'm really confused because I haunt touched anything back there. How can I check if it's the amp itself

 

[khubner1]

check your speaker wire arn't earthing out to the chasis as well. this would normaly only put the amp into protected mode but you never know.

to eliminate the amp as the problem change you speakers to run on the sub amp. you may need to do each speaker one at a time i don't know what kind of amp you have running the sub(s). and then change the subs onto the speaker amp this should help eliminate the either the speakers or the amp as the problemb.

generaly blowing a fuse indicates a short. this could be external or internal but you've got a short

 

[Gianni]

If I just unplug the rcas and speaker cables. And the amp starts fine then it would be an Isis with one of those cables yes?

If it still shorts what else could it be.

 

[Gianni]

Alright I took out all rcas and speaker cables. Fuse blows still (car not turned on)
Took off the remote wire. It still blows
Took out the ground and it doesn't blow. Put a fuse in then re attached ground and the fuse blows. The ground itself seems totally fine.
Opened the amp itself. But didn't really know what I was looking at. But couldn't smell or see anything burned. I checked through all the power cables and it's all fine. No grounding. I'm outa ideas

 

[Dean]

If its blowing fuses, it prob means there is a short somewhere.
Could you possibly have loosened a wire whilst installing the electric windows?
Just because you remove the ground doesnt mean this is the problem, it might just be that the amp isnt powering up at all because it doesnt have the ground wire to complete the circuit.
I'd say its an issue with your power wire.
How does your Main Power cable from your battery split to go to your various amps? Is it secure and covered? could it be touching metal?

 

[Gianni]

It has it's own power from battery. I checked it. Even mounted it on a different spot on the terminal. It's not touching anything I can see. At the same timely doesn't matter if ignition is on it blows as soon as the fuse is in

I checked speakers. And cross overs. Everything is secure.
I'll plug the power into the sub amp and see if that blows a fuse. Then again the fuse on the power cable isn't blowing

 

[khubner1]

the fuse on the power cable is generaly 2-3X bigger than the ones on the amp itself. and will usualyy only blow if your power cable earths out.

i currently have my power cable running from the bay to boot and fused at both ends because i have a 2farad capacitor in the boot. last thing i want is it earthing between the 2 and cooking my car just check all you cables and make sure none are frayed or earthing out if they are all sweet i would say the amp has an internal short and is probably cactus.

 

[4piknup]

you got an internal fault on that amp itself. pull cover off and have a look or if in warranty take it back, or take it to service tech guy, prob an easy fix.
if the only thing connected is power and earth and it still blows, its internal and before the power relays switched by the remote wire. it is very close to the power input point on the circuit board. should be cheap to fix

you have 2 seperate fused power wires, from the battery to the 2 amps. 1 amp runs sub and is fine, other is speakers and blows fuse on amp.
i reckon even if earth is disconnected, if you earth the amp body, the fuse will blow.
the short is between the fuse that blows and the relay that turns the amp on (ie. inside the amp), if it was in the power wire before the amp fuse, the amp fuse would be fine and the power fuse near the battery would blow.
g.l.

 

[Gianni]

Jack. I like where u are coming from. I'll do le check all my cables for frays. If all good I'll take it for repairs. What kinda place would fix it

 

[4piknup]

just the local stereo/ tv repairman should handle it. you know the $35 quote to repair mob

 

[Gianni]

Pulled amp apart. Here are some pick

And this looks like a problem. I connected it back with a dab of solder. But still piping fuses