Blown fuse 2007 lexus es 350

check the owners manual

Probably a blown fuse, this is how to replace it.
Interior Fuse Box Location 2007 2012 Lexus ES350 2008 Lexus ES350 3 5L V6

here is the fuse location
2007 Lexus ES 350 Owners Manual Page 325

Use a D C tester and check for voltage it could be a bad lighter. if that dose not work take your voltage tester and put one lead in the lighter hole on the center and ground the other lead to the metal on the car check for voltage. You may have a bad ground.

Check you owners manual it is in there.

On this website, you find fuse box diagram and description for Lexus ES350 (2007)

Lexus ES350 2007 fuse box diagram Auto Genius

LOOK ON FUSE COVER IT WILL HAVE CIGARETTE LIGHTER FUSE LOCATION.

Have a look at the fuse first The fuse must be in the main fuse box. The position and function of the fuses is normally marked on the inside of the fuse box cover and also in the owner's handbook. If you don't come right with these, work your way through the fuses looking for a blown one. To ease your search the lighter fuse it should be around 30 amps.
If the fuse checks out ok, the lighter itself could be faulty - carry out a continuity test across the heating coil.

generally its located under dash driver side fuse box

is the only thing not working the cigarette lighter? the fuse that operates it is usually the accessories fuse, it normally operates the interior light as well, which fuse box have you checked,there is most likely one under the bonnet & there also may be one under the dash as well, it might well be that the cigarette lighter element is the problem,try another lighter....hope this helps....cheers

check for burned fuses.