Automotive LED Tail Light Component Replacement

MisterBill2

Joined Jan 23, 2018
27,283
My first guess suggestion is to try that same part on a different supply and see if it works. BUT now for the questions. Is there a power control module some place else, OR, do the rear (tail) light normally operate on 12 volts DC directly???

The standard process for solving problems with systems having multiple parts is to determine which part is defective. In this case my guess is that if the LED part is removable, it should be tested separately, because that would be a simple and easy check to do.
BUT we have no idea as to if the LED is a part of the tail light assembly, so the situation may be more complex.

So "Jamie F" will need to answer quite a few questions in order to get advice that is just random guesses based on no information at all.
The only information we have so far is: " Aston Martin LED tail light." That is not enough.
 

Thread Starter

Jamie F

Joined Dec 7, 2025
3
LEDs in circuit work fine as do individual ones.
As stated, some are also shared with other function (brake light).

My question is really to seek advice from someone who has better understanding of datasheets.
Which one of those links are suitable replacement for suspected faulty component.
 

MisterBill2

Joined Jan 23, 2018
27,283
OK, it was not clear to me that the problem has been traced to individual LED devices. THAT will be quite a different challenge, since it may not be possible to get the specifications of the original LEDs. Certainly the intensity specification at the specific wavelength will need to be closely matched, as well as the current draw in that application. I am guessing that the control module does also monitor the current for fault sensing purposes.
 
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