I am installing a 9130 in my 1990 32 excella . In removing my old convertor I found a large red wire+, a large white wire-, and a smaller black wire. The smaller black wire is what I am trying to figure out. Does anyone know what the smaller wire goes to.
It most likely is the wire to the Power On light in the control center. There is no easy way to make it do what it did with the original Univolt when you put a new converter/charger in. It was a special tap in the original humming box. Most just leave it disconnected from anything and if they want a power on light, use a little neon nightlight plugged into a 120 volt outlet in the trailer.
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