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If wondering, I had a previous 1993 Prowler. Its converter blow (for no apparent reason). To trouble-shoot, I simply found its converter, removed its "+" and "-" output port cables and plugged my 12V tester into its output ports. NO output. I then tested its 110/120V line (power in) using 110/120V tester, and checked its fuses as well. Yup. This factory Convertor has "110V in power" but no "12V out power". I then simply removed this old box and took removed box to my local RV store. Their RV parts guy simply matched it with his on-shelf stock units. For my older TT, I went from factory 40A to much better Progressive 45A unit (with no thicker wire changes). I simple removed the old box and connected the new box - ensuring its "+" and "-" ports were properly connected as well. Yes, its replacement cost me a few dollars. Especially buying new from RV parts store instead of shopping around. But, my TT's RV power problem was immediately fixed.
re:
http://www.progressivedyn.com/prod_details/rv_conv/rv_converter_pd9145a_2.htmlThis same approach might work for your older TT as well.