Loud screeching noise when radio is turned on did the same thing w/the original stereo and when a new cd deck wasn installed i have a 1991 chevrolet caprice classic and everytime the stereo is turned on it makes a loud screeching nosie
Well depending on the model of your car.. Ive had 1991's caprice's with the bose audio upgrade,, theres an Amp in the trunk between the 6x9's, I turned on the radio on one of these cars and turned it off just that fast because of a high pich sound, I tried everything then unhooked the amp,, I had to rewire 3 out of the four speakers because the harness sharred those wires aswell.. the feedback or short was now gone...
BAD GROUND. CHECK GROUND CONNECTION IN THE KICK SIDE OF THE DRIVER PLACE, UNDER CARPET YOU WILL FIND A NUT ATTACHING SEVERAL CABLES TO CHASIS, CLEAN AND RE ADJUST
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