My radio buzzes pretty bad, it doesn't matter if I'm using the tape player or the radio, and it doesn't matter even if I turn the volume all the way down. It's an 89 chevy pickup with two front speakers, the noise comes from both of them, even if you fade it to the opposite one and listen. I replaced plugs, wires, and cap/rotor. Even though it sounds like a blower it was only cool for a week or so. What might be causing this?

 

EMI, electro magnetic interference...im thinking your rcas or your speakers wires are too close to another major power wire in the car. Try re-wiring the front speakers.

 

Re-wiring them starting from the radio? I'm assuming the interference is down there where both speaker wires run near one another because the same sound is coming from both of them. Am I on the right track with this?

 

well its a very common problem if you run your rcas too close to your amp power wire

but it doesnt sound like you're running an aftermarket system are you?

 

nope, the whole vehicle was untouched for 200k miles until I got ahold of it as a work truck. I don't think it's had mice in it chewing anything up though, it's very clean inside and out.

 

one of the wires has come loose.

when they come loose and either ground out, or are just unplugged enough, they can become a "antenna" and pick up the alternator noise...

my camaro started doing it out of nowhere last week.... i look in the back, and somehow my left rear speaker RCA cable going into the amp came loose.. soon as i pushed it up tight, it was fine.

since its all stock, you probly dont need a noise filter or anything, somthings just probly loose.

 

On stock, unmolested setups unplug and pug back in the harness like ten times. This will clean off the contacts on the harness. If it still buzzes, and it probably will, try running a ground wire right from the metal frame of the radio to a good ground. But it is vary likely there is a problem in the radio making this happen.

 

theres still the chance that a cap or somthing finally blew too.... in that case, you may just need a new radio..

if you like the stock look, you can get newer GM radios off ebay, and put thoes in... better quality sound, but with stock look and feel.

 

When you re-wire use Gamma wires, work great

 

"theres still the chance that a cap or somthing finally blew too.... in that case, you may just need a new radio.. "

More then likely it would be a bad solder connection at ether a cap or a ground some where, this if it IS the radio. Pull the radio out of the dash just enough to be ably to “hit” the side of it. If the problem changes it is probably a bad solder connection in the unit.

 

Engine whine is often caused by one of three things. Most commonly it is a bad ground. Your ground wire should always be as thick as possible and NEVER longer than 12-18 inches. You also should always ground your radio with its own wire. Don't trust the factory harness' ground. Often times it is quite a few feet long and will provide that wonderful whine. Try a new ground first. It's the simplest fix and is most often the problem.

Here is a link to the Rockford Fosgate's Tech Article on Engine Whine. It deals with an aftermarket setup but the concept applies to audio equipment in general.

http://www.rockfordfosgate.com/scrip...cGFnZT0x&p_li=