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AUX DIY Static Noise

Xter21

Member
Herts
Hi everyone,

So I bought this https://www.amazon.co.uk/gp/product/B01DGI9T9U/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1 cable from amazon a while ago. I would connect my bluetooth transmitter/receiver and apart from a random switch from aux to radio, it worked perfectly fine - no static noise.

Then I picked up a cheap OEM AUX socket with fascia on ebay and when my original cable snapped, I cut the female end off and was left with 3 wires shielded in red, white & yellow. Below is the OEM AUX socket that I got from ebay.

IMG_5984.jpg
IMG_5983.jpg

I wasn't too sure how to connect those 3 wires to the 4 pins in the socket, but as silly as it may sound, I used my ears to see which combination would give the best quality of sound (and obviously output through all the speakers) :| The problem, however, is that now I have slight static noise whilst audio is live. It goes really bad when the bluetooth device is being charged at the same time.

Is this because I did not connect the wires to the pins correctly? In which case I hope someone can kindly tell me how to do that! Or is it due to something else? Like I said, I had no issues before and the only difference is the added OEM Aux socket. Perhaps, it is worth mentioning that the static does change in pitch as I wiggle the connection into the socket.
 
I would guess that one of those pins is illumination and you have possibly connected audio earth to it? You need the wiring diagram for the aux socket or use a multimeter to determine which pin does what.
 
Jl-c said:
I would guess that one of those pins is illumination and you have possibly connected audio earth to it? You need the wiring diagram for the aux socket or use a multimeter to determine which pin does what.

Hi, thanks for replying. Not sure what do you mean by illumination. To be honest, I tried many combinations, but to no avail. Makes me think that maybe one of the wires needs to connect to 2 pins simultaneously or something... I’ve searched on the internet for the diagram - couldn’t find anything. Perhaps, worth another go. Last resort will be a multimeter if I can’t figure this out!
 
I am guessing that the white text is backlit when lights are on. I don’t know but cannot see why it has 4 pins otherwise.
 
I thought that’s what you meant :) There is no illumination in the socket. I found some pics online with the right plug to the back of the AUX socket and it has the same colour wires, connecting to 3 pins, leaving one out. In this case, I must have made the same connection at some point, but the static was still there. Strange.
 
Seems like the issue is the charger itself, how strange! If I wiggle the charging adapter, static changes until there is nothing at all when it is in the right position. Makes sense as i DIY’d it after the last one broke haha.

Besides, it looks like the red wire is actually ground as I couldn’t get any sound from it by connecting it to individual pins in the socket.

Anyways, problem sorted - just need a decent charging adapter!
 
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