I found this switch on my driver seat and I looked in the manual and it doesn't have it. I pushed it but felt nothing, does anyone know what this switch does?

 

My guess is its heated seats? But I don't remember...does your mustang have the heated seats switch on the seat or on the dash/center console stack?

 

looks like a heated seat button.

I can't be certain, but I don't think they actually do anything unless the car is running....and at least in mine, it take a few minute to heat up.

Is it at the back side of the seat or the front side of the seat? If it's the front side I'd go for heater.

Mine is on the center console on the Mustang but on the seat side on the Tahoe.

 

I've got an 08 premium and I've never noticed a button like that....I know the buttons for the seats are on the bottom of the center dash.

 

maybe someone installed aftermarket heated seats?

 

^^another aftermarket item!!! I am going to find this previous owner and beat him like the reddest hairest steppest child in the world. I am going to test this heated seat theory.
the switch is located toward the front of the seat near the lumbar controls. I got blanks where the normal heated seat buttons would be. and I tested it and nothing happened.

 

I've not heard of after market heated seats.....

 

me neither until now, I can confirm it is an after market heated seat button, now the next question is which brand so I can get a user manual so I can trouble shoot why they don't work. yeah I live in Florida and would never use them, but I got a beef with non functioning equipment in my car... just ask the code alarm remote start and keyless entry.. now sitting in the nearest landfill.

 

That is the switch for an aftermarket heated seat kit.

 

wish I had heated seats. Leather gets cold in the winter... if we have a winter