Question about Rockford Fosgate Punch P4004 Car Audio Amplifier

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Protection light goes on and off

MY protection light comes on and off. wiring is good and i took the amps cover off and everything looks ok. no idea whats goin on

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Test subs you may have blown the voice coil

Posted on Feb 16, 2009

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1 Answer

Kenwood kac 628 red light comes on and no audio output


The red light you describe on your amp, is the protection mode warning light. An amp goes into protect for many reasons. Here's a checklist.

1st check the fuse (s) on your amp and make sure they are not blown.

2nd check the inline fuse next to your car battery (if you have an inline fuse)

3rd, disconnect the speaker wires with amp on, does the light go off?

4th check your ground, this may be ok if you have tried another amp with the same wires.

5th.if none of these turns the protect mode off, it may be an internal fault.

you may have blown transistors and it is a tricky job to repair and costly.

Jan 28, 2013 | Kenwood KAC-628 Car Audio Amplifier

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How do i get my amp out of protect mode? when everything is unhooked but the hot, ground, and rem wires, as soon as the amp comes on it goes n to protect mode how do i get it out


Check to make sure that there are no stray wires crossing into other inputs in the amp, if everything checks out OK then the problem is internal.

Oct 27, 2011 | Lanzar VIBE286 Car Audio Amplifier

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Got a problem with my car amp.Everything was working fine until 2day.Amp goes in to protection mode.Jumps from power to protection indicator every i would say 3 seconds and each time it goes in to...


Ok check the remote wire running from the headunit to the amp should be giving v12 feed whiles headunit is on.

check or change grounding position.

take cover off the amp as the circuit may be over heating.

Sep 22, 2010 | Car Audio & Video

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88 f250 diesel ticks hard pumps smoke still starts good and no power loss, took vavle cover off and everything looks ok wat should i check next wat would i look for if i was to pull injectors


The problem is the glow plugs are bad or not coming on. Even though the "wait to start" light comes on, the glow plugs may not come on. I have found when this happens, the light comes on for only 1-2 seconds and goes off. With the engine cold, the light should stay on for about 5 to 7 seconds. The colder the engine, the longer the plugs should stay on. There is one glow plug for each cyl. The plugs are in the "V" of the engine and screwed into head. Only one wire goes to the glow plug and the wire runs from one plug to the next on each bank. You test them by removing them and grounding the body and putting 12v positive to the terminal. The tip should glow red hot like a cigarette lighter. There is a glow plug relay behind the air intake horn which also could be the problem and there is a engine temp sensor in the circuit also.

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Our polaris sportsman 500 6x6 won't start


Polaris seems to have a problem with this issue. I had the same problem with my bike and was able to fix it . I found a bad resetable fuse link located under the front cover. It looks like a plastic case with wires at both ends. cut the case and check the condition of that part. I found it was badly rusted . I removed the part and wired in a 10 amp fuse with a holder. wrapped it up to protect it and the problem was gone. lights worked fine as well as the cluster. Ed.

Oct 11, 2009 | Polaris ATV

1 Answer

P3002 protect light problem


sounds like u have shorted opt transistors no big deal goto nte electronics.com and replace . these amps r known 4 postive switching regulators going bad 3$ part rep[lace the #sholud be like tl 494cn square 14 pin blk long hopes this help u later dude

Mar 17, 2009 | Car Audio & Video

1 Answer

Powers isnt turning on but everythings hooked up?


Check the fuses. If the fuse is bad the amp's power supply is burnt. If the red light stays red and never goes green then your amp is in protect mode and the output section is burnt.To test for rem. problem just use a jumper wire (paper clip... or whatever)to jump from +12v power to rem. If rem. wire has no voltage when your radio is turned on that will make your amp come on. then look for the fuse in the rem. line. Good luck !

barneyluc

Oct 03, 2008 | Car Audio & Video

3 Answers

Amp protection


Does it go into protect if you disconnect the speaker wires from the speaker terminals of the amp?

Feb 16, 2008 | Sony Xplod XM-1652Z Car Audio Amplifier

1 Answer

Sony explode amp for my car


Try disconnecting everything but the power connections. If the protection light still comes on, then there's a problem in the amp. If it goes out, then there's a problem elsewhere. In that case, hook up one speaker cable at a time and power on. If the protection light comes on, then either that speaker is bad, or you've got too many speakers connected to that one amp output. Too many speakers connected together can cause an overload and trigger the protection circuitry, or worse, blow out something out.

Hope this helps, and please rate my advice.
Thank you, and good luck!!

Feb 04, 2008 | Car Audio & Video

1 Answer

My amp quit working


ok I thought I anwered this one but first thing to try is disconnect all your speakers and see if the light goes out if it doesnt then your gonna need a schematic and a working know how on solid state amplifiers. first check al the outputs for the speakers for dc If theres dc on an output then that output device is shorted or leaky. Ive have open drivers as well as current control transistors leaky or shorted to that made the protection come on.. Good Luck

Apr 07, 2006 | AudioBahn A6004T Car Audio Amplifier

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