Hey guys I just picked up a 06 F150 ext cab XLT 4x4 and on the post coming from the windshield to the rearview mirror there is a box with wires going up to the headliner anybody know what it is i look in the owners manual and unless i missed it i could not find anything on it any help would be great.

Thanks John

 

This is a guess so don't quote me on it.

I've always assumed that it's the photo sensor for the auto headlights. I think the compass might be up there too because when I had one of those cheap mexican magnetic necklaces around the mirror my dash display didn't seem to ever have the right direction on the guage cluster.

 

That box is for you compass!

 

Thanks for the reply's

John

 

on 04+s the light sensor is the little pod on the dash on the drivers side. Might be for the compass. I could look it up, but im sure others will respond that know for sure.

 

I thought that little pod was the security system led. Is it dual purpose?

 

the led part of the pod is security, but there is actually a light sensing probe in there too.

notice its alot larger diameter then a typical single led security light is? and it kinda has a smoked tint to it?
-Patrick

 

It also operates the auto dim rear view mirror.

 

Compass/Autodim Rearview

 

it's actually on the FRONT of the rear view mirror