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I'm not sure if other members here can help you, but you might want to try a mustang forum like corral.net or stangnet.com....they might be able to help you futher than I could, or someone here at FTE, but hopefully an FTE member will have an answer for you.
I had the same kind of problem in one of my dad's trucks at work. I found 4 pens and a small bottle in the heating ducts. Maybe take it apart and see what you find. Good luck!
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.