I am trying to find a 12v power source under the hood to run LED lights?

 

other than the battery??

 

Yes, the battery is the trunk on the Hybrids

 

They tried running a 12 V source on my 600 and ended up causing a loop that would not allow my car to turn off anymore so be careful what you tap. Look up threads on wiring fogs alone they might give you some ideas.