last night my truck had been running for about 3 hours straight and i was sitting in a parking lot waiting for a buddies car to warm up (it was only 2 deg out) and a light popped up on my dash and it looks like this (!) but when i bought my truck i didn't get a service manual with it so i don't want tot take it to the dealer if it is something simple. thanks guys for your help i appreciate it.

 

Go here to find your manual online.

https://www.fleet.ford.com/maintenan...ls/default.asp

From the manual for an 05 f150.
(!)
BRAKE

"Brake system warning light: To confirm the brake system warning
light is functional, it will momentarily illuminate when the ignition is
turned to the ON position when the engine is not running, or in a
position between ON and START, or by applying the parking brake when
the ignition is turned to the ON position."

Hope this helps!

 

thanks for the info and ill check that web site out and get me a service manual on the way thanks again.