Question about Cars & Trucks
An expert who has achieved level 3 by getting 1000 points
You need to install a power line input filter to filter out the electrical whining noise from the Alternator. See a local car stereo shop.
Posted on Jul 15, 2017
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Posted on Jan 02, 2017
SOURCE: 1989 Chevy Truck , Stock Radio , Whining noise
Sounds like you have a capacitor problem.It could be a number of issues , but i suggest you check the alternator one first.
If you unplug the power cable to the back of the alternator and the whining goes away then replace the capacitor(usually only one bolt/screw)and you should be OK.
If not I sometimes have dissconnected the + wire from the HT coil when the car is running and the same applies,and if this works replace the capacitor or fit one if there isn't.
If none of this helps fit one to the + wires of your radio.
Please leave fair comment if I have helped you.
Thank you
Posted on Sep 01, 2009
Testimonial: "This is Great Info, I'll try all ideas . Ross "
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this is the best i can do for a diagram. it is the easiest to explain how to do this job.
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