Ignition whine in speakers Topic is solved

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive P2 platform cars sold as model years 2001-2007 (North American market year designations).

2001 - 2007 V70
2001 - 2004 V70 XC (Cross Country)
2004 - 2007 XC70 (Cross Country)
2001 - 2009 S60
2003 - 2007 S60 R
2004 - 2007 V70 R

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vtl
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Re: Ignition whine in speakers

Post by vtl »

Long ground wire is a source of the ground loop. To be of the same potential both the HU and Yatour would need to have an equally short ground wires connected to the same ground point.

Power in, power out and the ground, yes.
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Yaworski
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Post by Yaworski »

vtl wrote: Mon Sep 30, 2019 12:58 pmHave this one for power: https://www.amazon.com/gp/product/B0049MWUMQ It was DOA, but I was able to swap transistors and capacitor, so it works.
Would I put this in the power line for the Yatour box? The power line for the radio before the tap off to the Yatour? Or the radio power line after the tap?

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Post by Yaworski »

vtl wrote: Wed Oct 02, 2019 10:31 am Long ground wire is a source of the ground loop. To be of the same potential both the HU and Yatour would need to have an equally short ground wires connected to the same ground point.

Power in, power out and the ground, yes.
The Yatour doesn't have a separate ground wire. I think that it is grounded through the DIN plug.

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Post by vtl »

Yaworski wrote: Sun Oct 06, 2019 2:29 pm Would I put this in the power line for the Yatour box? The power line for the radio before the tap off to the Yatour? Or the radio power line after the tap?
Between HU and Yatour, closer to Yatour.

I think I said that before, but I also had to break off the loop for line-in for my central speaker amp as well. The whine was minor, lot less than through ground, but still.
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Post by Yaworski »

vtl wrote: Mon Oct 07, 2019 5:54 amBetween HU and Yatour, closer to Yatour.
Another question. Should I ground the filter directly to the car's chassis, the radio's chassis, or through the ground wire for the radio?

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Post by vtl »

Yaworski wrote: Thu Oct 10, 2019 10:31 am Another question. Should I ground the filter directly to the car's chassis, the radio's chassis, or through the ground wire for the radio?
You do not need to ground it to the chassis.
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Post by Yaworski »

vtl wrote: Thu Oct 10, 2019 10:52 amYou do not need to ground it to the chassis.
Just hook to the radio harness' ground wire?

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Post by vtl »

Hook to Yatour's harness. Either splice the cable or make your own male-female adapter. Solder noise suppressor's ground wire to harness' ground wire, cut +12v wire, one end solder to green (input), another to red (output).
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Post by Yaworski »

The Yatour doesn't have a separate ground. I'm guessing that it is grounded though the DIN plug and the the DIN's shell. So solder the ground to the DIN shell?
Last edited by Yaworski on Fri Oct 11, 2019 1:40 pm, edited 1 time in total.

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Post by vtl »

Solder black wire to the GND wire in the cable. The idea is to feed the +12v through the noise suppressor.
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