Signal Ground?

Home / the12volt's Install Bay / Car Audio / Signal Ground? (

Topic Closed)

Welcome Guest :)

Members

< Prev Topic Next Topic >

scchang

Member - Posts: 2

Joined: February 13, 2005

Posted: February 16, 2005 at 11:20 PM / IP Logged

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?

geepherder

Platinum - Posts: 3,668

This member consistently provides reliable information

Joined: October 27, 2003

Posted: February 17, 2005 at 7:18 AM / IP Logged

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.

My ex once told me I have a perfect face for radio.

scchang

Member - Posts: 2

Joined: February 13, 2005

Posted: February 20, 2005 at 5:37 PM / IP Logged

I tried grounding to the changer itelf, but the problem is unchanged. I'm not using an FM mod. Any other thoughts?

geepherder

Platinum - Posts: 3,668

Joined: October 27, 2003

Posted: February 20, 2005 at 8:51 PM / IP Logged

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.

My ex once told me I have a perfect face for radio.

Sorry, you can NOT post a reply.
This topic is closed.

Printable version

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

Search the12volt.com

Follow the12volt.com

Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

Signal Ground?

Sorry, you can NOT post a reply.This topic is closed.

Sorry, you can NOT post a reply.
This topic is closed.