I have a 2018 F150 XL, regular cab, SWB. It has the standard Sirrus XM radio with door speakers and a couple in the dash area. I have some nice stereo equipment, amps speakers etc, that I want to install. Can anyone tell me if there is any pre-wires for speakers, behind the seat coming from the stereo to add rear speakers, or possibly a sub? Thanks!

 

Not sure I follow your question completely but that's not normal practice to have a car pre-wired for aftermarket equipment. That will almost never be the case. With the XL you won't have an amp other than the headunit so no wires behind the rear seat.

Head over to the audio section of the forum and you can read up on what you'll need.

 

I don't know if the 18 has this, but there is a harness for adding a sub behind the back seat on the driver side. I haven't done this but others on here have. You will need to add a connector etc. Here is a good write up of someone who has done this.

https://www.f150forum.com/f118/how-i...g-play-424185/

 

It will not come pre wired.

 

Good article, thanks! I will take a look and see if I have one of those connectors. Seems it is hit or miss with some makes and models.