alternator whine

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alternator whine - 8/10/2004 5:52:43 PM    taco   Posts: 14 Joined: 5/31/2004 Status: offline Hey, I just recently bought a 1987 5.0 LX and I was told by the owner that the radio tended to make noises at times. Well I didn't really mind not being able to listen to my radio at first, but now would like to try and fix it so I can listen to it. There's an aftermarket deck that has a CD player, speakers in the doors, and amp. I'm pretty sure that it's alternator whine because from what I read if the whine sound that it has increases and decreases with rpms then that's what it would be. It makes this whine when the radio is on and when a CD is in only when the engine is on, when it is off it sounds fine. I tryed unplugging the RCAs and listening for any sound and I heard none so I would imagine that the amp is grounded fine. From what I have read and understanded I need a noise filter/noise suppression kit. Wanted to get some input on this before I go and doing anything that I don't need to do. Any help would be great. Thanks in advance. Post #: 1

RE: alternator whine - 8/10/2004 5:55:26 PM    Krusher Posts: 584 Joined: 11/12/2003 From: Horsham, PA Status: offline ground loop. Clean the ground spot to bare metal. (in reply to taco) Post #: 2

RE: alternator whine - 8/10/2004 6:08:25 PM    taco   Posts: 14 Joined: 5/31/2004 Status: offline Hey, Are you talking about the amp ground spot? If so I will check that out. The amp ground goes through a plastic interior piece and then into metal, would that have any effect on how good the ground is? (in reply to Krusher) Post #: 3

RE: alternator whine - 8/10/2004 6:35:31 PM    Krusher Posts: 584 Joined: 11/12/2003 From: Horsham, PA Status: offline the wires inside of the grounding strap/wire must be in direct contact with a bare metal surface that leads directly to the negative lead on the battery. (in reply to taco) Post #: 4

RE: alternator whine - 8/10/2004 8:37:30 PM    taco   Posts: 14 Joined: 5/31/2004 Status: offline Ok, I will try to check that out soon and see what happens. Thanks for the input. (in reply to Krusher) Post #: 5

RE: alternator whine - 8/12/2004 6:33:15 PM    taco   Posts: 14 Joined: 5/31/2004 Status: offline Problem fixed. It was the ground for the amp. (in reply to taco) Post #: 6

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