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It would be helpful if you put specifics about your problem. What make and year vehicle, what stereo system and if the system is stock. If the system is modified or replaced, put exact details of what you have.
It is only going to slow down any help that you want by not giving this information. It is also a good idea to check the archives for postings on a similar topic. This will allow you to ask intelligent qustions. Unfortunately, many posting from the last few years seem to be missing.