There is often an in line fuse in the black wire (hot wire) located near the battery. It's possible that it blew that fuse also. IN an RV White is the ground wire. It is also possible that the converter was not the problem as it could also have been a loose connection somewhere that is now full time loose.
Usually when the converter goes it just quite working all together.
Good luck / Skip
2011 F-150 HD Ecoboost 3.5 V6. 2550 payload, 17,100 GCVWR -
2004 F-150 HD (Traded after 80,000 towing miles)
2007 Rockwood 8314SS 34' travel trailer
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