All Things Mk5 > Sat Nav and Car Audio

Help - White Noise/Interference When Headlights are on!

<< < (2/3) > >>

Squeeguk:
First thing is to double check all your earth points. You could have a ground loop somewhere. 9 times out of 10, noise is introduced into the system by bad grounding and not running wires next to each other. That can create noise, but not nearly as much as bad earthing.

With your issues with alternator noise too, I would go ahead and double check all your earth points, making sure they are as short as possible and as clean as possible and secure. Start with the battery and check your battery earth strap, then work your way back through the system. Earthing to the body correctly is better than earthing to the battery negative terminal.

Using a ground loop isolator is not the answer. It's like taking medicine to make you feel better temporarily, but not curing the root cause.

Randeep:
Thanks for advice guys I was thinking of getting a ground loop isolator but I would rather try and get to the root if possible for cleaner sound. I hear ground loop isolaters can have an an affect of the clarity of the sound. Im not a pro at this kind of stuff can do bits but always worried I'm going to break something lol  :ashamed:

So earthing...both amps have a earth each relatively short, just long enough to put the seats down, they are screwed into the boot floor under the carpet as close as possible to the edge, the area was sanded down first. The head unit is already grounded through the iso, but added another wire running behind the glove box and screwed it into the side of the car near the passenger side.

Just find it strange thats it related to the lights only. I'm a bit of a noob looking at the engine bay of a Mk5 (its my new toy). I Will have a look at it tomorrow at some point now. Where is the battery earth strap end? Are there any points to defo check at all, ie known points that cause issues?

Thanks
Randeep

Randeep:
Ok, so I checked the battery earthing and everything looks pretty clean. Had a look at some of the other points that I could visibly see and get too and gave them a quick clean but still no joy.

skard:
Just to be clear as my last post probablt wasn't, I suggested a ground loop isolator for testing to determine whether it cuts down on interference (before you start undoing the work) rather than as a fix.

When I used one it cut out the interference I had, so pointed me towards a poor video cable for the camera thus I invested in a big fat insulated one without further issue, and subsequent removal of the isolator.

Squeeguk:
Try reducing the length of the earth wire for your HU. It's not really necessary to actually run one of those at all unless you are running power direct from the battery to the HU. Try run it without that earth wire and see what happens. If you feel you must run that, then shorten the wire considerably and attach it to a point on the metal dash frame near the radio.

Navigation

[0] Message Index

[#] Next page

[*] Previous page