I have 1989 chrysler new yorker. My2 front and rear speakers sound liker I have a mini radio transistor. This happened from one day to the next. Ichecked my fuses. Changed radios. Tried a different speaker . Still have the same problem. I have 2 mini speakers that are right before the windshield and I connected a speaker and it works . So ireally have 6 speakers total. 2 front 2 rearand the 2 on the dash. Is there a hidden fuse somewhere?