I work in a automotive shop so i have decent DC voltage knowledge but im not sure what i could use to make a circuit for the project i have.

basic layout:
4 LED rings that run off of 12v, 2 on each side around the headlights
i would like to have 3 separate power sources.
1. a switched 12v source
2. a 12v source from my interior lights
3. one from the blinkers on each side separate so they function as blinkers

i was planning on running the grounds straight to the chassis, then just run power into the lights, the blinker 12v+ wire is right next to the rings, the interior lights can be run off a 12v+ from inside, i was planning on using a relay and switching the ground for the switched 12v source

 

You made a boo-boo. Automotive modifications are not allowed on this website.
One of the moderators will be along in a while to explain the Terms of Service.

 

The owners of All About Circuits has 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 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:

http://forum.allaboutcircuits.com/showthread.php?t=54400

Another good forum that shares many of the same membership is http://www.electro-tech-online.com/ . Good luck.