Stock stereo is shreeking. Wastsup?

[danjrusdug]

I've got a 90 325i. This morning I started the car, turned on the tunes and there was a high pitch shrill coming out of the speakers. Changed stations, same thing. Any ideas?

Also, anyone have a center rear bumper filler piece for sale?

Thanks in advance,

Doug
'90 325i
'73 2002tii

[PiercedE30]

probably a bad ground causing the electrical system to backfeed through the stereo. very common with e30's since the speakers are "common ground" (all the speakers ground to the chasis instead of the head unit. check the alternator grounds, engine grounds, etc.

[danjrusdug]

Thanks.

Just had the a/c compressor replaced yesterday. Something must have been loosened during the replacement.

[emi325i]

I had the same problem with my car... bad a/c compressor..