First, welcome to Sunline Owners Club.
If yours had the little silver device in the wood box with 2 screw terminals, that is a self resetting circuit breaker. It will reset when it cools down and the overcurrent goers away.
However your "might" have a fuse in place of the self resetting circuit breaker. And yes it may be blown.
You most likely also blew a fuse or 2 where all the branch circuits and the converter are. I do not know what brand/style converter your 2002 had. A Centurion like Pablo and I had or a Mangnatec and then which one.
If the fuse changing does not fix this, try and post some pics of what you have so we can better help. There may even be a fuse on the power converter itself that blew as part of a reverse polarity protection.
Hope this helps
Maybe someone with a 2002 camper can chime in on what they have and where all the fuses are.
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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