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Loud "blob" sound after installing xcarlink

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madst   
Thu Feb 14 2019, 05:27pm
Joined: Feb 03 2018
Member No: #3419
Location: Western Jutland
I have installed a xcarlink SKU707, and it worked perfectly immediately. Almost unbelievably easy to install.

But:

Now I experience a quite loud "blob" sound from the sound system when starting the engine. Some times it comes when I get into the car before starting the engine.

The sound is similar to when you disconnect the wiring on the back of the radio unit, if anyone ever tried that?

Even though the car is not fitted with a cd changer, the cd port was already occupied on the back of the radio. I removed that plug to add the xcarlink plug instead. I assume that should not have any influence on how the radio reacts then the engine starts?
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1 User said Thank You to madst for this Post :
 cruiserphil (15 February 2019)
cruiserphil   
Fri Feb 15 2019, 09:47am

Joined: Jan 24 2010
Member No: #38
Location: Celbridge
Hello Madst,

One of our cars came with a USB unit in the glove box. We get the exact same "thump" from the speakers that you talk about when you unlock the car and the BSI comes live. Originally the USB unit was disconnected from the radio head when we bought the car. Perhaps the previous owner didn't like the noise.

I presume the XCarlink is powering up from a BSI mounted fuse holder which makes it turn on when you unlock the car even though you have not turned o the radio.

I fitted a dashcam to one of the cars and the power supply came with a clever jumper fuse arrangement. However I could not find any fuse in the passenger compartment fusebox that is powered from the ignition. The upper fuses are live off the battery and the BSI fuses come live when the BSI powers up. I checked the wiring diagrams and this is the arrangement. I didn't go to the trouble to find a power supply downstream of the ignition as I didn't want to start splicing into wires and the jumper fuse is very neat. So the dashcam powers up when you unlock the car/open the door and only switches off when the BSI shuts down.

Hope this helps.

Best regards,

Phil C.

2 User said Thank You to cruiserphil for this Post :
 madst (15 February 2019) , 321dave (15 February 2019)
madst   
Fri Feb 15 2019, 10:01am
Joined: Feb 03 2018
Member No: #3419
Location: Western Jutland
Hello Phil.

Is does indeed seem to be the same issue, and thanks for your input!

Br Mads
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2 User said Thank You to madst for this Post :
 cruiserphil (15 February 2019) , 321dave (17 February 2019)
madst   
Sat Feb 16 2019, 03:58pm
Joined: Feb 03 2018
Member No: #3419
Location: Western Jutland
Update:

It seems the problem has nothing to do with the xcarlink unit.

After unplugging it completely, the problem still exists.

When I then tried plugging in the "original" plug occupying the cd changer socket on the back of the head unit, the thumping sound disappeared.

I wonder what the plug and wiring is for - the car has no cd changer.

I also noticed that the car alarm started to work again after plugging in the original plug - that didn't work with the xcarlink connected (I don't need it anyways).
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2 User said Thank You to madst for this Post :
 321dave (17 February 2019) , cruiserphil (18 February 2019)
e3steve   
Tue Feb 19 2019, 09:24pm
Joined: Jan 21 2013
Member No: #1163
Location: Warsash, Hants & Palma de Mallorca, Spain
My older-type xcarlink that I inherited did the same, so I unplugged it (from the unit in the glovebox) and the 'whoomp' ceased.
madst   
Sun Mar 10 2019, 06:50pm
Joined: Feb 03 2018
Member No: #3419
Location: Western Jutland
I realised that I should have mentioned that the car is equipped with the JLB sound system. Is it needed with some additional wiring in this case?

So I am back to the initial question:

If the car hasn't got any external cd changer, what is the plug occupying that post on the radio used for?

To plug in the xcarlink, I had to remove another plug from the external cd changer port - I assume there could be an issue with the external amp coming to live together with the BSI and makes the thud, if the plug I removed is in any way connected with the external amp?
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furriegurrie   
Sun Mar 10 2019, 07:59pm
Joined: Dec 23 2015
Member No: #2448
Location: Roosendaal
Not sure if applicable for your situation but I've once been told that if you want to use the cd changer port for something else you need to disconnect the cd changer cable on both sides. So from the back of the hu but also from the changer....
madst   
Wed Mar 27 2019, 06:03pm
Joined: Feb 03 2018
Member No: #3419
Location: Western Jutland
Update: I've spent some time communicating with xcarlink, and they ended up with the proposed solution that both plugs need to be connected at the same time for everything towork and the thud not to happen. They have offered me a Y splitter at a quite high price, and I am currently considering it.
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2 User said Thank You to madst for this Post :
 cruiserphil (28 March 2019) , e3steve (30 March 2019)
 

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