Power Outlet 2003 Corolla

Can somebody give me some guide or links with info on how to rewire or modify the power outlet so that it's always on?

2003 corolla le

I would just run a new line from the battery if you are using a power inverter or something that uses alot of amps.

You could also use a test probe to test wires until you find one that is hot while the car is off, I did this for my blazer when I wanted to add in an always on outlet.

You could just splice into the always on wire for the radio, according to the pdf the always on battery wire to the radio would be either purple with a yellow stripe or just yellow.

http://installdr.com/Harnesses/Toyota-Wiring.pdf