Question about Rockford Fosgate Punch P4004 Car Audio Amplifier

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Blown fuses I have a punch 150 amp for over a year now with no problems. Today it blew the fuse on the power wire at the battery. I've checked the power and ground wire for shorts but none were found. Please help!

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Re: blown fuses

I used to have one of those amps also (nice amp btw) Did you try another fuse of the same size?
Is it blowing fuses everytime you put one in or did it just blow that one fuse ?
Is the conection on the battery solid and clean of corrosion build up? Because that is a good amp and if wired properly shouldnt blow out or anything and so if the speaker is not blown then maybe connection is weak somewhere? I would try disconnecting the speakers from it and try a new fuse and if it does not blow the new fuse than amp is ok? and if it does blow the new fuse right away then there must be a short somewhere in the wire or the amp. then disconnect the fuse again and reconnect the speakers and if the fuse blows with the speakers connected but doesnt blow with them disconnected then you know it is a blown speaker causing the problem.

Just currious but what size fuse do you have connected at the battery?

Posted on Dec 22, 2008

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that big coil of wires ytou described is the transformer for the switching power supply. Sounds like you over heated it and blew out the supply or the output section. From what you described you should take or send this unit into be serviced as there are no user serviceable parts in this unit except a fudse maybe and if thats blown theres more problems as thats there ( the fuse) just so the whole bloody thing dosent burn up your car! Good Luck

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