Maybe it's not the fault of the MS908 at all (which is self powered) . Did you try a generic run of the mill code scanner? (not just another Post Ford Lawsuit updated 908 either, Heh ,Heh :-) I'm talking about your garden variety Autozone type that require power source from the vehicle's DLC. If it don't power up you check the fuses replace the blown one , and yeah , now you probably get communication. LOL