Electrical help!

[mothgils]

I have a LED tail light that I purchased from DCC and when I hit the brakes (front or back), it lights up great. When I turn on the headlight/taillight, the light won't change when the brakes are pressed. I have about 10-11 volts when pressing the brake and no lights on and when I turn on the brake light, it is drawing about the same power as well.


My question is, can I put a resistor inline from the power source to the taillight to reduce voltage? If so, what does the voltage need to be reduced to and what size resistor would I need?




Does anyone have any ideas??


Thanks,
Andrew

 

[Big R]

Can you post a link of the light or a pic of the wires? Sounds like it may just be wired up wrong.

 

[hurley209]

Agreed, probably wired wrong, I've done that too

 

[AlphaDogChoppers]

Put a regular light bulb in it and see if it still does the same thing.

 

[mothgils]

No it didn't. I hooked up the stock gigantic taillight and it worked just fine. With the taillight on, you could hit the brake and light it up!

 

[Bud]

Same thing happened to me on my two wire taillight from DCC--until I hooked up a ground.

 

[boykinjw]

I have the same issue with a three wire TL from DCC. When the lights are on its not a huge difference when I hit the brakes. I thought about the ground and ran a jumper from the black wire to the neg battery terminal and there was no real improvement. It was basically the cheapest round tail light I could find on DCC, so maybe you get what you pay for...

 

[johngofast]

I'd bet $1 you have the ground connected to one of the other wires and not where it should be. I did it at 4AM the other day and thats exactly what happened. :