TG Twinkie: if the converter output is shorted, it is downstream from the battery and will blow fuses in series with either.
Gordy: your trailer definitely has a converter and may have an inverter. The converter converts shore power to 12volts to operate almost everything in the trailer and charge the batteries. An inverter, if you have one, takes 12 volts from the batteries and creates 110 volts AC to operate things that run on AC when shore power is not available.
Your converter may be under the bed, sofa, or dinette. The converter proper is a metal box about 10 inches by 4 inches x 3 inches. It may be part of a larger assembly (the power center) which includes the DC fuse panel.
"You cannot reason someone out of a position they have not been reasoned into"
Al, K5TAN and Missy, N4RGO
2002 Classic 30 Slideout
2001 Safari 25 RB Twin (Gone, but not forgotten)
2013 Dodge 2500 Laramie 4x4 Megacab Cummins
WBCCI 1322, TAC FL-39, AIR 82265