some of the older converters have an external smart attachment available that can be plugged into the existing converter to upgrade it. My 2004 IOTA is that way, and it cost about $30 and 15 minutes to install. Most of the time was just accessing the converter behind a false wall.
2003 Ford F-350 V-10 Crew Cab 4WD Long Bed
2004 Jayco Designer Medallion 29 RLTS 5th wheel
Bill, Gayle, and Mindi (dachshund)
Retired at last !
Nothing is foolproof to a sufficiently talented fool.