In a large bowl, toss the cabbage, tomatoes, peppers, onions, chiles and salt well with your hands. Cover and refrigerate at least 4 hours and up to overnight. Drain in a colander, rinse, and drain again.
Meanwhile, in a medium saucepan, stir together the vinegar, water, sugar, mustard seeds, celery seeds and turmeric until the sugar dissolves. You can let the mixture sit as long as the vegetables do.