Your Mustang's fuel, temperature, and oil pressure gauges all work on the same principle—resistance to current flow to ground and how that affects needle position in the gauge. In fact fuel, ...

Analog gauges are great—when they're neatly packaged into individual housings. When you start dealing with circuit-board analogs, such as those found on 1973-and-up Chevy/GMC pickups, things get a bit ...