I asked this in the Superduty forum but no one seems to have the answer. Someone suggested trying here.
The truck now has a Viper alarm and remote start that is controlled by it's own fobs. I reprogramed one of the original Ford truck fobs to work with another Ford car (which works fine). However if I attempt to open the car, it also opens the truck which sets the alarm off in the truck, because the old fob still unlocks the doors. So I need to somehow get the truck to forget about the old key fobs.
I tried going through the Program procedure and not activate any old fobs, but the old fobs still work.
Silly Idea but he could get a fob from Ebay and program
that one in then sell it on Ebay. But that still leaves a programed
fob out there.
Maybe he could talk a Ford tech into a case of beer trade
or something like that.