LED Custom Tail light problem.

[Josh V.]

I need some assistance from someone who knows LED circuitry.

 

I bought a set of LED tail lights from another vehicle to use the boards to modify them to fit my datsun. One problem, on the passenger side the the brake light doesn't work. The tail light/parking light does but when I brake it doesn't get any brighter. The driver's side works fine as it's supposed to. I'd like to know where I should start to fix the issue. Fuse is fine. Brake light works fine with the OEM's on. Wires aren't crimped in anyway upon mounting.

 

 

 

[erichwaslike]

try flipping the wires from tain and brake, you may have them backwards so the tail is bright and the brake is dim and never gets brighter....

[Josh V.]

try flipping the wires from tain and brake, you may have them backwards so the tail is bright and the brake is dim and never gets brighter....

I dont think that's the problem.

I have a pair of these boards and if I put them next to each other tail lights are clearly dim when lit.

When I hit the brake, the left board's LEDs lights up brighter.

[MikeRL411]

Might this be a DIP switch setting problem?

[brodster]

We should be able to troubleshoot this.  Do you have a voltmeter/multimeter?

 

I am going to take a guess that these lights are PWM driven. Do you see a strobe affect or pulsating ghost affect when you wave the board in front of your eyes or shake your head really quick?

 

I am assuming that little module with the red stripe on it controls this. Everything else is very standard looking: resistors, diodes, cap, LEDs.

 

Is there any other identifying info on that unit. I see LB039. I can also kind of make out a number on that module: JC 2H084A??

 

Any info like that helps me hunt down a schematic and really simplifies trouble shooting.

 

Thanks

[Josh V.]

I do have a multimeter. I made the mistake buying a self-powered test light. killed the bulb in it the first minute I bought it. haha.

 

No strobe effect or anything of that nature.

 

there are some numbers on it but never found anything online looking them up.

 

- LB039-R [1136]

 

on the module with the red stripe it says:

-JC-2H084A

 

on the back there is a serial number on it:

s/n:1109091211

 

Thank you so much for your help guys. I truly appreciate it.