Warning Lights and Gauges

Check the fuses under the steering column. In particular, look for a "gauges" fuse. If that isn't listed as a separate fuse, the fastest test is to use a test light to check each fuse. There are two tiny access holes in the top of each fuse to take the measurements. With the ignition switch turned on, some fuses will have 12 volts on both terminals and a few will have 0 volts on both terminals because those circuits are turned off. You're looking for a fuse that has 12 volts on one terminal and 0 volts on the other one. The really slow way of checking fuses is to pull each one out one-by-one and visually inspect them.