12V tail light problem

Not open for further replies.

Thread Starter


Joined May 22, 2015
Ok guys, Here is what I'm doing. I have a 1988 Corvette and I'm fabricating an LED Eagle Eye set-up. The vehicle has a 2-wire set-up with variable voltage at the light switch for running lights and brake/turning signal. What I'm trying to do is fabricate an outer ring inside each light assembly for the running lights (lower voltage) and and when turn signal or brake lights come on all leds will illuminate with full 12v. Problem is the two wire harness.
Is there a electrical part that can discriminate between a lower voltage and higher voltage? Am I lookat this all wrong? Is it just a wiring issue? Any help is greatly appreciated.


Joined Dec 13, 2013
your 2 wire is actually a 3 wire. tail light , brake light and ground. the corvette is fiberglass and requires a ground wire to each light socket.

Thread Starter


Joined May 22, 2015
I could have sworn it was source voltage and ground but I was not absolutely sure. If that is the case then this project just got quite a bit easier. Thank you very much alfacliff!


Joined Feb 20, 2011
AAC doesn't allow automotive modifications. I expect your thread will be closed soon. Just be prepared.

It's a safety/liability thing.


Joined Aug 23, 2012
Welcome to the AAC forum.

The owners of All About Circuits have elected not to host discussions of automotive electrical system modifications/enhancements due to safety concerns, the potential of legal ramifications and the possible circumvention of vehicle regulations at the state and federal level.

This thread is against the AAC forum rules, Chapter 6, as seen here:

6. Restricted topics. The following topics are regularly raised and however are considered “off-topic” at all times and will results in Your thread being closed without question:

  • Any kind of over-unity devices and systems
  • Automotive modifications
  • Devices designed to electrocute or shock another person
  • LEDs to mains
  • Phone jammers
  • Rail guns and high-energy projectile devices
  • Transformer-less power supplies
This can be found in our Terms of Service (ToS)

Automotive modifications of any kind are strictly forbidden. Therefore, this thread will be closed.

Please try to understand the reasons behind this action, and feel free to browse and use the forums.

You might find answers to your questions in one of these forums:


Another good forum that shares many of the same membership is http://www.electro-tech-online.com/ .
Good luck.
Not open for further replies.