4X4 switch?!
 

Hello, I have a 94 B4000 4x4. It has manual hubs and electronic engagement. The switch on the dash does not light up when pressed, and I suspect the switch. The fuses are good, and I have power/ground at the connector of the switch. Can anyone tell me what wires are active when off, 4x4, and low range are engaged? Thanks, BW