in my car the antenna is intertwined with the rear heater in the rear window. do this: check it on a known good AM station. if you can pick up AM, your antenna is fine. you may then have a problem with the FM tuner in your radio and there isnt much that can be done aside from replacing or repairing your radio. if you cant pick up AM your antenna may be bad. you have to have a good, working antenna to pick up AM, where FM you dont really have to have one.
hopefully that helps and welcome to the forums...
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