Stereo Cutout

[Steeda300]

Im not sure if this is the right place to post this but here we go.When I bought my truck it already had an aftermarket cd player in it with the stock speakers. I replaced the cd player with another one, and replaced the speakers with newer ones as well. It seems to work fine up to a certain volume, but when its too high it shuts itself off and then restarts. Any idea why this would happen? Is my alternator/battery too weak? Do I need an amp? Please help. Thanks.

[fordman]

sounds like a radio problem and not the truck. getting too hot maybe. or a loose power wire.

[Cipher43]

You may want to test your speakers and radio out separately so you can be sure but it sounds like you have a bad speaker/hooked up backwards. I have had both bad radio and a blown speaker due that to me before. If they are brand new speakers still test each because they could have been bad from the factory. Thats my

[Clunker]

Does the power cut out with the engine running or just when the engine is off? Are you using any power amplifiers? Many car stereo products have an overload safety switch that prevents them from overheating or otherwise overloading the system. The issue is usually caused by an insufficient power source (voltage is too low, power wire is too thin and can't carry enough current, ground wire is too thin or has a poor contact with the chassis, etc.). As colnago and I have been discussing on another thread, these trucks were not designed for electronic upgrades, and an in-dash power source may not be enough to handle the power demand of the stereo. My aftermarket gauges were only getting 9.7 volts until I ran a dedicated 12-volt lead directly from the battery with its own fuse. If your stereo isn't getting at least 11 volts, then it is likely the safety switch will trip. The more power your stereo requires, the more important it is to have sufficient wiring and voltage. That would explain why it only cuts out when you turn up the volume as this also increases power demand. The first step is to see what voltage you're getting at the stereo. Tell me a little bit about your setup (number of speakers, etc.). It could also be several other things that I might be able to diagnose.

[Nitekruizer]

Your stereo could have built in thermal protection of some type. Check to make sure that the impedance (ohms) of your speakers match the output impedance of your stereo. If the speaker impedance is too low it will overheat the amplifier's output IC's. So, if the stereo has a 4 ohm output then your total speaker impedance should be at least 4 ohms, even an 8 or 16 ohm speaker load would be okay. A 2 ohm load, on the other hand, would not be.
Also check all of the wiring connections to make sure they are good. Check the inline fuse holders too to make sure that they're not loose.
There could be an internal problem though. I had one that used to cut out. Luckily, it was still on warranty. I took it to a repeir shop and they fixed it. They told me that it had a bad solder joint on the PC board.