I plug it in and the screen does not light up. It works on my jeep but not my 03 150. Help appreciated!

 

Does your cigar lighter work? If not, you have a blown fuse.

 

My cigarette lighter does work.

 

Maybe the wires have been cut ?

I mention it because a friend of mine had his obd connector (in an Oldsmobile car) butchered by a previous owner who hacked the ignition to bypass the security module rather than pay money to get it done right when they needed a new ignition.

 

Look at the last data link pin on the bottom right side for being bent over or pushed back.
That pin supplies the Scanner power.
Good luck.

 

Make sure you don't confuse the cigar lighter with the accessory power point. They are different and are on different fuses.

 

Thanks gents! I will do some investigating and get back to you.