I own a non-tech FX35, I have an opportunity to pick some headphones off of a tech package, off of someone online. Will they work (plug and play)? Do I have to jumper out and do a mod on the wiring harness?
Not sure what you are trying to achieve, but if you don't have the video system option, these won't do a thing. The transmitter for them is part of the factory overhead video. You could always put in your own transmitter if you wanted to use them for another purpose.
I was under the impression that the technology pakage headphones were wireless, I am planning in the future to add some screens in the back, tying them into the audio system and having head phones for the rear passengers if they passengers wish to have them at their disposal. Or possibly having and secondary audio source for a passenger to listen if they so wish to.