Maker Pro
Maker Pro

Led from Mercedes headlight

Leds

Feb 10, 2018
4
Joined
Feb 10, 2018
Messages
4
Hello!
I had a spare headlight from my mercedes laying around and decided to take it apart. I took the powerfull led out.The problem is that I don't know what voltage I will have to connect to which contacts on the connector. Can someone pleas help me? I took some pictures and used a multimeter to make a scematic of al the connections.
 

Attachments

  • image.jpg
    image.jpg
    296.8 KB · Views: 87
  • image.jpg
    image.jpg
    341 KB · Views: 89
  • image.jpg
    image.jpg
    253 KB · Views: 93
  • image.jpg
    image.jpg
    202.5 KB · Views: 88

Externet

Aug 24, 2009
900
Joined
Aug 24, 2009
Messages
900
Get the vehicle wiring diagram to check if there is a power module driving the LED. That power module will be mandatory to use and fed by the 12V battery.
 

Leds

Feb 10, 2018
4
Joined
Feb 10, 2018
Messages
4
I don't think the power module will work for me. It has about 40 in/output pins. So that is bit to difficult I think.
 

Externet

Aug 24, 2009
900
Joined
Aug 24, 2009
Messages
900
Well, difficult is one thing; proper is another.
You can try feeding each led emitter with a current limited voltage source to the emission level of satisfaction under the smoking point.
 

Leds

Feb 10, 2018
4
Joined
Feb 10, 2018
Messages
4
That is what my plan already was, but than still which contactpoint is negative and which is positive? And what voltage should I hook up?
 

Externet

Aug 24, 2009
900
Joined
Aug 24, 2009
Messages
900
I would try first briefly with 2 AAA cells in series for 3V and mark red the + wire at the polarity that turns it on. It may be faint.
Then the polarity is known.
Next, depending on the voltage supply you want to use, calculate a series resistor, for which you should have an educated guess of the LEDs data sheet.
Edit. Magnifying your picture, see 6 emitters per LED. Perhaps the 3v will not be enough. 12V with 2KΩ in series may.
 
Last edited:

Bluejets

Oct 5, 2014
7,095
Joined
Oct 5, 2014
Messages
7,095
One would have to wonder why you would destroy an obviously expensive Mercedes part just to get a couple of LEDs.
 

kellys_eye

Jun 25, 2010
6,514
Joined
Jun 25, 2010
Messages
6,514
^ :D

You could check in the car itself and see which wires have power on them when you turn the lights on.
 

Leds

Feb 10, 2018
4
Joined
Feb 10, 2018
Messages
4
I got the light for free, and it had damage, but it still worked.

About the 2 AAA's in series to get 3 volt and test the polarity, I tried it with a 3.3 volt power suply with an other led out of the same headlight. So my first try was wrong and the Led was broken. This is my last led so I want to do it with care.
 
Top