I just switched cars and my amp was working fine in my old car, now when ever i hook my amp to my m-cap the protection light comes on and the amp won't work! I brought it to best buy and they told me all the wiring was hooked up fine and everything i just don't know what else to do any suggestions?
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Re: 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.
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first thing you want to check is the fuses in the amp, and power wire if applicable. This might cause the protection light to come on. I do assume you are referring to the protection light on the amp itself and not your car.
Post back if you have checked your fuses and have still not solved the problem.
when connecting or disconnecting 12v power dont let the screwdriver touch the screw in terminal and side of amp at same time it causes a short in amp send it in to the factory or it could be the internal battery is burnt out from crankin it to loud
If it is not turning on your problem is it is not getting power. Check your fuses. The reason an amp goes into protect mode is usually because the subs are not wired up right. Make sure your fuses are good, you have a good ground, and make sure your amp turn on wire didn't come loose when you were putting the deck back in. As for the amp going into protect you probably wired the subs down to too few ohms and the amp you have can't handle it. Try hooking the subs up straight w/o bridgeing them and turn it up to see if it works. If you don't have problems with it then you wired your subs wrong.
It sounds like the output transistors have shorted. This is VERY common. If you want to try to troubleshoot the problem, I'd need to see photos of the inside of the amp. You'll need a multimeter to check the transistors.
Before opening the amp, remove it from the power source.
Since the resolution is severely limited here, send the photos to me directly (firstname.lastname@example.org). If you're going to send multiple photos, please zip them and send one file.
Check the wiring between the sub and the amplifier. That's seems to be the only thing left that could cause a problem. If it's shorted to ground or pinched so the conductors are shorted together, it could cause the symptoms you listed.
1. Did you witness this amp ever working if not then you may have a blown amp. Hook up the speakers, get a portable player with a head phone jack get one of those cables with a headphone plug on one end and RCA's on the other plug the portable player into the amp and hit play. If sound comes out then your problems are elsewhere. If not I'm afraid your amp is probably toast. If the OHM rating of the speakers are too low for the amp then the amp will go into protect. This will be indicated by the protect LED lighting up or the power led changing color from say green to red.