A little electronics quesiton i have

[Max399]

Hey guys, i've got a problem, and thought maybe some of you could help me.
I own a 1988 BMW e30, and i've got myself a pair of LED Angel eyes, like these ones:





Quote from the seller:

Features

High-quality and durable
Easy to install
Long lasting
Unique vivid color
Fast response time
LED bulbs are not as bright as standard incandescent bulbs
Specifications

Color: white
No. of LED (SMD): 39
Chip type: 1210
Voltage: DC 12V
Outer diameter: 120mm
Package includes: two halo rings
Brand new

So i got 4 of these, and installed them in my headlights.
Closed everything with liquid nails so that no water could get into the headlights, and hooked them up directly to the place where my marker lights were. Ie, i removed the old marker lights and hooked two of these rings in parallel to the old connector.
All worked, all ok, heres a pic:



But then after about a month or maybe less, some of the leds started to go out, sometimes they work sometimes they dont, i dont get it.. So i just a replacement and then in about two weeks it started to happen with the new ones again..
Is there something i did wrong? Should i add some resistor so it doesent burn out like that, or some LED driver?
Thank you.

[NickBroderick]

They're probably just cheap and poorly made.

It's the lords way of saying you shouldn't put them on your e30.

[FunfGang]

Remove from e30, profit?


just kidding I'm going to run a set eventually, after I get my Wal Mart neon, just to anger people.

[Max399]

They actually look quite nice, well atleast until i can afford some HID Xenon's..
So it wont be the problem of my car electrics? And ataching some resistor wont help me too?
I thought it was something like they are made for 12v, and maybe when the car is running it gives more than 12v to the headlights, no?

[FunfGang]

It really shouldn't be sending anymore than 12v, maybe like, 12.5 max(how my car is at least, fully functional electronics).

So yeah, I'm with Nick that they're probably just cheap and that's why they're breaking. Have you looked at the backs? Like, seen if any of the little resisters(what they look like to me) are blown/ damaged?

[Christoph84]

It really shouldn't be sending anymore than 12v, maybe like, 12.5 max(how my car is at least, fully functional electronics).

So yeah, I'm with Nick that they're probably just cheap and that's why they're breaking. Have you looked at the backs? Like, seen if any of the little resisters(what they look like to me) are blown/ damaged?

Thats not really correct... When the alternator is working it the current is normally at around 13,6volts... May be to much for the LEDs...

[Max399]

It really shouldn't be sending anymore than 12v, maybe like, 12.5 max(how my car is at least, fully functional electronics).

So yeah, I'm with Nick that they're probably just cheap and that's why they're breaking. Have you looked at the backs? Like, seen if any of the little resisters(what they look like to me) are blown/ damaged?

All resistors at the back are ok. They work when i connect, but they may be switching on/off.
Maybe they're overheating from the voltage when the alternator is running? Can it be like that?

Thats not really correct... When the alternator is working it the current is normally at around 13,6volts... May be to much for the LEDs...

Yes, that what i was searching. I thought that may be the problem, just dont know how to fix it..

[stinkinrich]

Thats not really correct... When the alternator is working it the current is normally at around 13,6volts... May be to much for the LEDs...

13.6v from alternator to the battery yes, to keep it charged.

The LEDs will only draw 12v from the fusebox.

[Max399]

13.6v from alternator to the battery yes, to keep it charged.

The LEDs will only draw 12v from the fusebox.

So that means they're just crappy made?