I was having intermittent light cut outs, so I reflowed four points on the tether board in the loco. While I was doing it the black wire came unsoldered and I reattached it. Now when I run the engine everything works, light don't cut out, but the smoke unit heater isn't working. The fan is running fine. I checked the purple and brown wires for kinks or breaks and couldn't find any, and all the wires seem secure in their board sockets. Any ideas?
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