Member Since: 01 May 2015
Location: Moscow
Posts: 13
Reverse light socket pinout (D4 rear lights)
Hi!
I own a D3 with D4 rear lights.
Just wondering if anyone knows why there are 3 wires running to reverse light sockets?
I understand that one is a positive lead, one is a negative, but what is the third?
Is there any pinout of the socket?
I'd like to change reverse light bulbs with LEDs that are bulb-and-sockets and they have only two ( + and -) wores so i have to cut the stock socket and solder the new lights.
Thanks to everyone who can help me with this matter.
Cheers,
Ilya
25th Dec 2016 9:20 pm
philby258
Member Since: 18 Apr 2012
Location: Stockport cheshire
Posts: 654
Dont really understand what your trying to say, I have D4 rear lights in my D3 and the led reverse bulbs are a straight swap, you dont have to do anything with the wiring
26th Dec 2016 1:35 am
Wilfrid Maximus
Member Since: 01 May 2015
Location: Moscow
Posts: 13
Should have posted a pic if what i want to change the reverse ligts to.
These lights substitute not only the bulbs but also the sockets. That is why i have to mess with wiring.
26th Dec 2016 7:47 am
Mikeyb
Member Since: 08 Nov 2016
Location: Maldon, Essex
Posts: 515
Now I don't know the answer, but would they be anything to do with the canbus/lamp fail detection?
Or maybe simply just an addtional 12v feed to elsewhere?
Why the choice of a complicated bulb? Is it perhaps brighter than the straightforward plug in replacement?A vaccine does not stop you catching a virus, or passing it on, or getting ill from it, really ill. It does reduce the likelyhood of you dying when really, really ill. Stay Alive - KEEP AWAY FROM PEOPLE.
26th Dec 2016 12:18 pm
Wilfrid Maximus
Member Since: 01 May 2015
Location: Moscow
Posts: 13
Mikeyb wrote:
Now I don't know the answer, but would they be anything to do with the canbus/lamp fail detection?
Or maybe simply just an addtional 12v feed to elsewhere?
AFAIR, there is no rear bulbs fail detection in D3. Don't know if the same applies to D4 rear lights.
Hmm, in D4 rear lights all bulbs are interconnected, may be the bulbs are connected in a cascade ie common earth or common 12v?
26th Dec 2016 2:05 pm
Wilfrid Maximus
Member Since: 01 May 2015
Location: Moscow
Posts: 13
Navigator wrote:
Why the choice of a complicated bulb? Is it perhaps brighter than the straightforward plug in replacement?
These are way batter than many if not any LED bulbs
26th Dec 2016 2:35 pm
Narpy
Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830
Is the extra wire a positive feed to something else like a reverse camera perhaps?Mods:
Front Fogs + Halos
FBH Remote Control
The 1st Ever RRS Modded Grill
Garmin Nuvi + D4 Surround + Reversing Camera.
D4 Steering Wheel.
Rear Boot Spoiler.
Twin Brake Lights.
Wing Mirror Indicator Repeaters.
Long Roof Rails
Make your own Narpy grill thread
I'm not scared, I'm outta here.
26th Dec 2016 2:35 pm
Wilfrid Maximus
Member Since: 01 May 2015
Location: Moscow
Posts: 13
Narpy, i don't have a camera. The wires are stock D4, this is a reverse bulb holder in the first post as it is.
26th Dec 2016 2:42 pm
Narpy
Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830
You might not have one fitted but the wiring could still be there if your car was spec'd to have one installed as an option.
It could be a standard loom. Mods:
Front Fogs + Halos
FBH Remote Control
The 1st Ever RRS Modded Grill
Garmin Nuvi + D4 Surround + Reversing Camera.
D4 Steering Wheel.
Rear Boot Spoiler.
Twin Brake Lights.
Wing Mirror Indicator Repeaters.
Long Roof Rails
Make your own Narpy grill thread
I'm not scared, I'm outta here.
26th Dec 2016 2:48 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10628
rather than connecting all the earths together at one point, they like to chain them around.
The positive will go directly to the car plug.
The other 2 are earths (and need to be connected for the other lights to work) Be careful.
Try and leave the bulb holder
26th Dec 2016 4:35 pm
Wilfrid Maximus
Member Since: 01 May 2015
Location: Moscow
Posts: 13
THANKS, Pete!
Found the diagram on the forum http://www.disco3.co.uk/gallery/albums/use..._Light.png, must have missed it and just talked to my dad. He says what you say: one is 12v and other two are earth wires going in and out of the bulb holder.
Now i identify them, solder 12v to 12v of my led, connect earth wires and solder the united to earth of the led.
PS: will use Superseal connectors to make it plug and play if need to revert to stock bulb holder.
My thanks to all the participants. Will post the result.
26th Dec 2016 5:08 pm
Wilfrid Maximus
Member Since: 01 May 2015
Location: Moscow
Posts: 13
Did it!
left is a cheap chinese LED bulb, right is my new LED
two new LEDs
reverse lights are off
reverse lights are ONNN
28th Dec 2016 1:42 pm
HughMartin
Member Since: 30 Mar 2008
Location: Aberdeenshire
Posts: 751
What are these lights you have fitted? I'm looking for some brighter ones. Do you have a link?
28th Dec 2016 1:50 pm
Wilfrid Maximus
Member Since: 01 May 2015
Location: Moscow
Posts: 13
HughMartin,
sure, here's a link www.hiperlights.com
it's in Russian so googletranslate it
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