None of my factory gauges work 65 dart gt

Like the title says, my alternator, temp, and gas gauge do not work. Speedometer doesn’t work either which is strange because the cable is attached to the back of the Speedo and to the transmission. The lights for the guages all work. The turn signals indicators work, wipers work, but those 3 guages do not. All fuses are in place and fine. What should I check?