My 1996 Transit has a Ford 2015 audio unit. I've just had some welding work done on the van and the battery was, of course, disconnected whilst this was done. I put in the keycode (but see below!): the numbers appeared, but when I pressed "Select" the dashes simply re-appeared. Confident that this was the correct number, I went through this routine several times. After maybe the 6th(??) attempt the dashes remained all the while - the numbers not appearing as I tried to enter them. I've now discovered that I have another one of these units about the place (with its handbook/keycode) and I had been using the wrong number for the installed one. But now that I am trying to put in the number I *know* to be the correct one it won't accept the digits - the dashes remain. Is there any way I can get this unit back into service, please?
TIA for any replies.