If you need a new circuit board, they sell them on ebay for 79.00$. They claim to be improved over the original. I purchased one myself, but haven't installed it yet. I'm redoing my whole dash with new bulbs, circiut board, heater controls, glove box, paint and stereo.
1987 wrangler, 258 I-6, 5-speed.
2007 liberty sport 4X4, automatic
2009 ford ranger 4x4 FX4 OFF/ROAD, 5-speed