Amp No Longer Powering On
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=145601
Printed Date: May 07, 2025 at 5:33 PM
Topic: Amp No Longer Powering On
Posted By: fenster4
Subject: Amp No Longer Powering On
Date Posted: August 29, 2019 at 1:55 PM
Hi, I was reconnecting the power cord to the amp and didn't realize the key was in the ignition turned on with the radio volume down. As a result there was a spark and the amp no longer powers up. The amp in the power cord is not blown and I have tested the power to the amp from the power cord and it is delivering. What else could it be? Something in the amp itself?
Replies:
Posted By: timbo74
Date Posted: August 29, 2019 at 8:09 PM
Check the amps onboard fuse, or fuses, if that’s not it, you probably blew something.
This may be a learning experience, Never hook up, or unhook an amplifier with the main power fuse installed, or the head unit powered up. Always remove the fuse, and turn your key off before you do anything!
Posted By: i am an idiot
Date Posted: August 29, 2019 at 9:29 PM
Do you still have voltage on the remote wire at the amplifier?
Posted By: fenster4
Date Posted: August 30, 2019 at 12:18 AM
Okay, I will check the voltage on the remote wire. The onboard fuse along with the fuse between the 2-Channel High Power Line Output Converter and the amp are fine. The fuse in the power cable at the battery is fine. The 2-Channel High Power Line Output Converter lights up as well.
Posted By: fenster4
Date Posted: August 30, 2019 at 12:24 AM
It's the stock radio for a 2015 Jeep Rubicon by the way. The 2-Channel High Power Line Output Converter sits next to the amp and sub and lights up so it sounds like bad news for the amplifier? The amp is a Sound Storm SSL F2.600.
Posted By: i am an idiot
Date Posted: August 30, 2019 at 5:16 AM
You need to use a multimeter to verify power is getting to the power and remote terminals.
Posted By: fenster4
Date Posted: September 02, 2019 at 12:19 PM
I verified the amp is receiving power so there must be internal damage to the amp. Ugh.
Posted By: i am an idiot
Date Posted: September 02, 2019 at 1:02 PM
When checking the voltage, did you have your negative lead on the ground terminal of the amplifier, or on chassis? If you had it connected to chassis you need to do the following as well.
Check voltage from ground terminal of the amplifier to the chassis of the vehicle. Should read 0 volts, if it reads anything other than that you have a bad ground.
Posted By: fenster4
Date Posted: September 03, 2019 at 1:38 PM
I had it on the ground terminal on the amp. The ground terminal is ground to the chassis of the vehicle. That is a good point about the ground wire. I will check the voltage to verify it is 0.
Posted By: i am an idiot
Date Posted: September 03, 2019 at 2:32 PM
If you used the ground terminal of the amplifier as your ground reference for the meter, your ground is good. No need to check it. A lot of times people will use chassis and that does not check the ground connection. Unless it has blown fuses inside or on the endcap of the amplifier it is probably broken.
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