Hi Jim_037,
Hopefully someone with a Greystone like yours knows the answer on where the converter is located and will chime in. If not, you might call Heartland Customer Service at 877-262-8032 / 574-262-8030. Have your VIN # ready. They should be able to tell you.
There are typically 3 fuses on the converter. If someone was connecting the battery cables and caused an arc, that could have blown a fuse. Once you get to the converter, you'll see the fuses.
It's also possible that the converter plug has vibrated out of its outlet. If that's the case, when you re-plug, tie it down so it doesn't happen again.
And don't forget to check the 110V circuit breakers. If the breaker has tripped, the converter won't get any power to convert.
The easiest test for the converter is to put a voltmeter on the battery terminals. With converter working, voltage will be somewhere around 13.4V. Without the converter, the best you'd see would be maybe 12.4V.
You might find our
12V Block Diagram and Diagnostic Guide helpful in troubleshooting the problem.