Whine When Radio On

[Rock Hard Concrete]

I have this funny issue with my truck; when I turn the radio on I get this high pitched whine out of the speakers that matches the engine revs so it is really annoying. I think I read up before that someone had a similar issue and it ended up being a worn distributor causing interference.

Bought the truck with 76000 original a year ago and the radio whined then too, but it seems to be a bit louder now. Truck has about 78500 now.\

any ideas?

 

[Mrich0908]

Usually bad ground .

 

[89RCLB]

Usually bad ground .

X2

 

[2 Sweet]

I have the exact same issue, but it's intermittent. Some days it's loud, some days I can't hear it.

 

[Eskimomann209]

If it has an aftermarket system
Then the power cable following the RCA jacks will transfer a signal into the speakers

It’s best to run power to the amp from one side of the truck (like passenger) then run the RCA jacks on the drivers side

 

[skylark]

Perfectly normal. Almost all "modern day music" sounds like whining.

 

[jasons99hoe]

thats hilarious skylark. only time i have ever had this issue was with cheap RCA wires and ran them next to power cable for amp. deffinatley seperate if thats your case. other than that check grounds and insulation on wiring

 

[Disney]

My 94 did that too. Changed everything in the ignition system with no improvement at all. Eventually LS swapped the truck and now it's gone. Sounds drastic, but hey... It's fixed!!!

 

[Blue_C1500]

If it is a stock radio check your grounds. They cheesy braided ground isn't very good so you could run a good one from the block to the body & another on to the negative on the battery. If it's an after market radio with an amp, it could be the pico fuse inside the radio. Pioneer radios are famous for this but I have seen it on Kenwood and Sony too. If that's the case the easiest fix is to ground the outside of the RCAs like in this pic.

http://www.ecoustics.com/electronics/forum/car-audio/644225.jpg

 

[Rtlngr2]

I've run into this on many of our fleet vehicles with the Vortecs. Weather it was the 5.7's in the full size trucks or even the 4.3's in the s- series trucks. We found that it would happen more when broadcasting over our hand held communication radios. What we found was that when we could here the whine it was time to change the cap and rotor. Sounds strange but we would change them and the noise would go away. If we ignored it, later on in time we would actually have crank no start condition.