Question about Rockford Fosgate Punch 301M Car Audio Amplifier

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What do i do

My apm is not turning on and when i do the pwoer light and the thermal light comes on and when i put the ground in the hole amp turns off

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Make sure all you wiring is in the right place if they are then you amp have a prob

Posted on Jun 26, 2009

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1 Answer

How to i find out whats wrong with my bazooka tube i tried to hook it up to a car battery and car stereo out side but wont work ???


follow this steps and fix it. GOd bless you

  • Verify that the amplifier is turning on by looking to see that it is lit up.

  • 2
    Use a voltmeter to verify your power supply is a good 12 volts by touching the ground lead to you amplifier's ground screw and the positive one to the amplifier's constant power supply screw. Also verify that you have 12 volts coming from the remote lead wire which is usually a thin blue wire between the ground and constant 12 volt supply.

  • 3
    Look for the "thermal overload" light. It is usually a red LED on the side of the amp. If the amp feels really warm and this light is lit, the amp has probably overheated from being tuned wrong or turned up too loud and shut itself down to cool off.

  • 4
    Check the fuses on the amplifier. These can blow with extended use or during heavy bursts of use.

  • 5
    Make sure the "Gain" and other volume controls are turned up.

  • 6
    Confirm that the signal wire is still attached to the amplifier and has not come disconnected by vibrations in the car. Also check that the wires running out of the amp to the speakers are still attached to the amp.

Oct 27, 2013 | Car Audio & Video

1 Answer

Power steering not working, and put power steering fluid in car


Lets use common sense here

It leaks,you stop using the car & repair the leak

Most likely the steering rack is worn & needs to be replaced

That's what happens when you don't flush the fluid every
3 years or it leaks & runs low

Oct 10, 2012 | Ford Taurus Cars & Trucks

1 Answer

My Friend put A Rockford Fosgate P250.2 Amp in his car and while hooking it up he forgot to connect the ground but still got power to the amp but no sound from the subs and the thermal light is on. so he...


Your friend has damaged his amp. The power light coming on means that the amp's power indicator LED is at least working. That light is only there to tell you that the amp is receiving power on it's 12 volt rails, not that it's necessarily using the power in any way other than warming up the amp's internal circuitry. When you say the amp gets power, I'm not clear on whether you mean the amp works in that fashion, or there's just a red LED glowing but nothing else happens. The amp needs to be repaired, and I would suggest to him to not apply power to it again until it is checked by a professional. The power supply has probably been damaged, and it's possible, depending on how the amp was mounted, that it was searching for ground through the amp's chassis if it was screwed into metal at its mounting location. All that seems certain as of now is that the LED works, but nothing else, unfortunately.

Jul 02, 2017 | Rockford Fosgate P3001 Car Audio Amplifier

1 Answer

Amp wont turn on just thr red thermal light


First ceck yor ground. itshoul be grounded directly to the frame andto clean bare metal. sedonc check your wires to make sure nothing is chaffed and grounded out. after that you can check yur subs to make sure the ohm load is safe for your amp..let me know if theres anyting else to help out!

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2 Answers

Thermal light goes away when ground added


Doesn't sound like anything is wrong. If the thermal light is on before you have the ground hooked up then the amp is probably getting a small amount of electrical ground from the shielding on the RCAs or its mounting to the chassis of the vehicle allowing the amp to "barely turn on" (not enough ground). I can imagine this would make the amp think something is wrong (ie: thermal light) . May I suggest that you do not try to turn any amplifier on without ALL appropriate wires connected correctly.

Mar 01, 2010 | Rockford Fosgate Punch P5002 Car Audio...

1 Answer

Rockford P5002 amp problem with thermal light and low voltage


Hello rbenwalker,

The voltage drop may not be in the actual power wire itself. The same reading on both the B+ and remote terminal probably points to a bad or high resistance ground. Try a different ground point or make sure there isn't any corrosion, paint or anything else preventing metal to metal contact.

Hope this helps.

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1 Answer

I need to run the filter pump without power to the heater


dont worry about the heater it will not come on so turn the pump on before it turn green call a pool guy

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I have an american legacy series 2 1000watt apm


Check and see what size fuses it uses. Your watt power means nothing without good fuses. My suggestion would be to go buy 40a fuses and replace the ones you already have.

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Rockford Amp - When grounded, both power and thermal lights go off


You shouldn't have the power wire connected to the amp without having the amp's ground terminal connected to a good ground. With some amps, it will damage the head unit.


Does the amp power up normally if you connect power and ground and then apply remote voltage (turn the head unit on)?

Dec 18, 2007 | Rockford Fosgate Punch P5002 Car Audio...

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