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Car amp blows 12 volt wire fuse

I have my grounds secure. My amp wired correctly, yet my my amp will blow the fuse that is in the 12 volt wire running from my battery to the amp. I wasted 20 fuses all of witch was 20-30 (size). The amp I have is 1600 watts, and recently I had a sony explode (250 Watt amp) hook up and it served no problem. Is there any certain procedures i need to take to avoid this? Should I just hook 12 gauge wire with no fuse directly to the amp?

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The wire from your battery is blowing fuses? and you are using 20-30 A fuses? mine has a 100A fuse..look into getting new wire plus my wire is 4 gauge.., 1600 watts is too powerful for a 12 g wire and a 30 A fuse

Posted on Nov 18, 2008

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A power wire with no fuse will set the car on fire if the wire shorts to ground or if the amplifier draws too much current through it.

A 12g wire is too small for a 1600 watt amplifier.

If the amplifier only blows the fuse after the remote voltage is applied (after the head unit is switched on - volume at minimum setting), the amplifier likely has shorted output transistors and will need to be repaired.

Posted on Jul 27, 2008

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The cd player is not able to save eny thing like radio channals and every time when i start the car engin the cd make auto eject it mean that i have a problem with saving can u help me about this


you must have a digital volt meter and to find this out .
1. remove radio
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3 take the black test lead and put it on ground for the radio it will be black find in harness on back of radio .
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if no power at yellow wire go to fuse panel and use your digital voltmeter to check fuses for a blow fuse . take the meter turn it on meter to dc voltage and the take black test lead and find a good ground (clean piece of metal and then the red test lead start touching testing the fuses.


(turn your car ignition switch to run but dont start car) why some circuit in car only power up when you have car ignition on ....)

on the fuse there is the amp rating in the dead center on either side of the rating is the blads of the fuse expose to test the fuse touch the red test lead to the left and see if you get 12 volts. then test the right side of the fuse to see if you get 12 volts if not fuse is blown . do this to all the fuses untile you find a blow fuse you could just pull one fuse at a time untile you find blow fuse. if you do this make sure right amp fuse get back to the right spot in fuse pannel. if not you could have a fire maybe or melt something in car if a circuit fails and goes to blow fuse and fuse is too big and fuse doesnt blow ....

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Keep blowing fuse for radio what is colr of constant wire


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Hello opey_69a,

Here are the troubleshooting steps for fuses blowing.
1) Remove all wiring except ground, power and remote and see if the amp powers up without blowing the fuses. If it does, the problem is in the input cables or speaker wiring.
2) The use of loudspeaker impedances below the recommended minimums will cause the amp to draw excessive current - check.
3) A shorted or grounded RCA cable may cause the fuses to blow - check.
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Hope this helps.

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1 Answer

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