[Zeke]

Well, you can't do a hard reset if you leave 9v in the system. It was a suggestion which by nature is an internet danger. I did not know that Jags were susceptible to going completely dead.

Now I'm wondering since this car has gone dead a few times if that is what has made the computer show codes that are not there. I wonder if any Jag people rent that expensive cable. It's not like the Durametric that only takes up to 5 VIN's.

I clip my 9v into the fuse panel on the Boxster to save the radio code. If you get locked out and don't have the code, the radio and sound system is done. Going full dead means draining capacitors so hence the soft start.