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S80 '98-'06 / S60 '00-'09 / V70 & XC70 '00-'07 General Forum for the P2-platform S60 / V70 / XC70 / S80 models |
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S80 Amplified Stereo & Handfree IssueViews : 1326 Replies : 12Users Viewing This Thread : |
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Nov 16th, 2019, 23:17 | #1 |
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S80 Amplified Stereo & Handfree Issue
Hi all.
Apologies for my first post being a technical question, but i would really appreciate some help please. I have a 2003 S80 D5 with the Pro Logic stereo with the amplifier under the driver’s seat. I have fit a handsfree kit today by using a SOT043 harness connected at the amplifier end and then i ran cables up to the back of the stereo to wire in the two live feeds and the earth. My problem is that the minute i turn the ignition on i get terrible interference through the speakers which gets louder with the stereo volume. However, if i try and make a call it cuts the stereo like it should and the phone comes through the front speakers with no interference. If I start moving around the live cables i can get the interference tone to change but i have checked the connections are good and not getting trapped anywhere. Has anybody come across anything similar in the past? Do i need some sort of device to stop the interference? Any help would be gratefully received. Many thanks, Michael |
Nov 17th, 2019, 08:58 | #2 |
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Hello Michael
I can't quite follow where you've made connections? The SOT adaptor fits behind the radio, but instead of the grey speaker plug connecting to the speaker connector on the radio it plugs into the return lead from the amplifier (two grey connectors joined to each other that could be tucked away). |
Nov 17th, 2019, 09:43 | #3 | |
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Quote:
Thanks, Michael |
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Nov 17th, 2019, 10:02 | #4 | |
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What I'm thinking is that you must have extended the wiring from the green connector back to the radio? You could have created an earth loop, or a wire is acting like an aerial. I would try the SOT adaptor at the back of the radio with no extra leads and go from there. |
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Nov 17th, 2019, 13:30 | #5 | |
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Quote:
Thanks, Michael |
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Nov 17th, 2019, 14:32 | #6 |
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You seem to be going in the right direction.
Most hands free units have there own amplifier to drive the speakers, hence the box that goes into the speaker wires. It contains relays to disconnect the cars amplifier and then connects its own signal to the speakers. It is strange that you are getting noise all the time. I wonder if you have a duff hands-free kit? What make/model is the hands-free? |
Nov 17th, 2019, 20:31 | #7 | |
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The handsfree kit is a Novero (i’ve Had one before and that was very good) |
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Nov 18th, 2019, 09:45 | #8 |
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Yes, that's the part I was meaning. You have a noise that has started since you connected the hands free kit, it's all the time regardless of if the radio is on or off. To me that suggests the part you've plugged in - the hands free box - looks a likely source of the noise.
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Nov 18th, 2019, 10:52 | #9 | |
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Thanks, Michael |
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Nov 18th, 2019, 11:35 | #10 |
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To me it's all too much of a coincidence that you installed something new and now there are problems with things that have worked fine for years.
The only other thing I can suggest is that you may have disturbed another connector on the radio wiring. There is a lead which feeds a low level signal from the radio to the under-seat amplifier. Other than that I think you're looking at a faulty hands free kit. The way to say for certain is to remove the hands free and the SOT lead, if all is well, plug the SOT lead in, but not with the hands free connected, just join the ISO speaker leads on the SOT lead to each other. Finally plug the hands free in again. With the cut-out issue you'll need to try each option for a couple of hours. |
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amplifier, handsfree, s80, stereo |
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