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Re: RADIO SHOWS STATIONS BUT NO SOUND FROM SPEAKERS
If no sound from both speakers check fuse, if some hissing or humming on full volume then its a fault in oscilator section if there is no hiss or hum at full volume its a breakage in the wires of speakers, if one speaker is ok its aagain a wire open problem in out put section open up the speakers and just apply 1.5 volts dc for fraction of second to the speaker leads , if theres crackling the speaker is ok also see for torn out cones or stuck cone or speaker coil open.
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These cars have an Amplifier to run the speakers. The amp is normally in the truck between the rear 6x9 speakers. The amp is probably fried. You can buy bypass wire harnesses on Ebay that will bypass the failing amp, or simply get a new one.
What kind of problems are you having? Is it static? Are the problems just with radio stations or with cd/tape player? Is it after market radio or is it a stock system? Does it even turn on? Give me a little more information and I can help you for sure.
So everything is coming on but you have no sound from anything?If that is the case you may want to check the amp fuse.The car has a factory amp i'm trying to remember i think it is in the trunk.Look in your owners manuel for the fuse box location.If the fuse is good then the factory amp may be bad.Or you may have a blown speaker that is showing a short and putting the amp into protect.If the amp and or speakers are bad i highly recommend just buying after market speakers/amp.The price for the factory equipment is very high and there labor rates even higher lol.Plus if properly installed you will noticed better sound from the after market stuff as long as you get brand name equipment.Go to a well trusted audio shop in your area they should be able to see if it is a speaker or amp problem if your fuses are all good.They should be able to test the impedance of the speakers at the amp for you and see what is going on.
If the system you bought is marked BOSE, it does not have any onboard amplifier power. The only powered radios for the Catera are units which only have AM/FM/Tape, all the CD units are Bose systems which used separate amps mounted on a tray in the trunk.