Installed DVD changer. It works except there is alternator whine. Unit has Power Ground and Signal Ground. Manual says to avoid grounding them at the same location which I have followed. Elsewhere, it says "Don't connect the ground of the changer to the chassis."Both grounds are short and avoid power harnesses. What is a Signal Ground? Is it really necessary? Could it be causing the whine? Where else would one connect to but the chassis except the battery terminal?
The signal ground is the outer conductor of your RCA's. Try connecting this ground to the metal casing of the changer itself. Then connect power ground to vehicle chassis. If you're using an FM mod, then be sure to use the inline noise filter that came with it.
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My ex once told me I have a perfect face for radio.
I tried grounding to the changer itelf, but the problem is unchanged. I'm not using an FM mod. Any other thoughts?
As long as you've run your power and RCA's separately (that's the main thing), just make sure you're away from any vehicle computers, or other noisy sources. Are you using quality RCA's, or the junk that came with the system? If you have identified the source of noise and for some reason it seems impractical to reroute your wiring, you can use an inline noise filter.
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My ex once told me I have a perfect face for radio.