| Author |
Message |
    
Willard Lee (Wlee69)
| | Posted on Saturday, December 28, 2002 - 01:22 pm: | 
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I received a new stereo for Christmas and spent some time today trying it put in my 2000 Disco II with the factory H/K stuff.
I bought the VW harness and connected all the wires. A added RCA connectors to connect up the the aftermarket HU. I'm still using the factory amp/speakers - so the signal is just going from the new HU to the factory amp.
Every thing works great until I start the car and got the whine noise. Interestingly enough it doesn't seem to be related the the alternator because it is at a constant level regardless of what RPM the car is. I've read in some other post that the whine isn't an uncommon thing when replacing the stereo. I did think ahead and buy an inline noise suppressor for the + wire. It doesn't seem to work though...
I remember seeing post about buying something from RadioShack to solve the problem...does anyone know the specific part? or what it is called? Also, do you hook it up to the red(ign) wire or the yellow (constant) wire. Also where is the best place to ground the aftermarket HU? There doesn't seem to be much space behind the stereo. or do you just connect it to the existing ground on the factory harness.
Lots of questions but the noise sure is a PITA!
Thanks in advance,
Will |
gp (Garrett)
| | Posted on Saturday, December 28, 2002 - 02:26 pm: |
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most likely interference from your alt. very common among the Discos. pretty sure there is some kind ground loop that can take care of this. hopefully some of the techno gear heads will chime in.
but at least you know it is common and many of us either just turn up the radio of fix it. |
Aaron Richardet (Draaronr)
| | Posted on Saturday, December 28, 2002 - 06:36 pm: |
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make sure that your new rca wires are not run along the power wires. including the remote turn on for amps. otherwise it will wine. |
Craig Kobayashi (Koby)
| | Posted on Monday, December 30, 2002 - 01:26 am: |
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I had the same problem in my aftermarket install.
I have a 5 channel amp mounted in the drivers-side rear storage bin. Power and RCA cables from the aftermarket head unit running side by side along the driver's side.
With the amplifier's gain turned up, alternator noise was very apparent and extremely irritating.
I found that the stereo install shop had turned the gain up to the max for some odd reason. I turned down the gain on the amplifier, and it silenced the whine. However, this was a lazy man's stab at fixing the problem.
Ultimately, Garrett is probably correct in diagnosing a ground loop. They are very common in aftermarket stereo system installs. The trick is identifying where the ground loop is. This can be a major PITA.
Aaron has a good suggestion. If you are going to take apart the system to identify where the ground loop is, try rerouting either the RCA patch cables or the amplifier power cables and see if that makes a difference. |
Willard Lee (Wlee69)
| | Posted on Monday, December 30, 2002 - 08:03 am: |
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Actually, I haven't replaced the amplifier yet. All I did was the headunit. What I did do (which I'm questioning) is solder RCA plugs to the end of the stock wires and connect them to the low-level outputs on the new aftermarket HU. These stock wires are the ones that are then the input into the stock amp.
Anybody try just hooking up the high-level outputs from the aftermarket HU instead of using the low level outputs?
Thanks,
Will |
Robert Sublett (Rubisco98)
| | Posted on Monday, December 30, 2002 - 08:43 am: |
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Aftermarket radio in your DII? Did you find an install kit or did you just get a radio big enough to fill the entire hole? I have a radio to put in my wife's D2 but have been lost as to where I can find a suitable install kit. If there is anyway you could snap a picture of the deck in place I would greatly appreciate it. Peace.. Oh, and GP and Aaron both had my suggestions (ground loop isolator or power wires running along RCAs) Good luck.. Robert Sublett |
Willard Lee (Wlee69)
| | Posted on Monday, December 30, 2002 - 10:10 am: |
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Rob - When you take the stock radio out - its actually just a regular DIN size stereo. Its just the faceplate that is larger. So any DIN size stereo will fit in the space. And you can buy a trim piece to fit in the little slot where the faceplace used to hang down - or you can just leave it and there is a little hole there....
You don't need an install kit or anything to put an aftermarket radio in....
I'll take some pics and email it to you if you want!
THanks,
Will |
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