Additionally, you could easily have blown bulbs. Some are a pain to change out, but others are fairly simple.... I have one bulb that's wires/socket gives me a hard time quite often for the Tach. I slap the dash and it comes on. If there is a lot of dirt, dust, or corrosion up in the terminals/sockets for them, you will experience problems with them working. These issues will create both ground and current issues. Good luck with an easy fuse swap, but check a little deeper to see if there is crud up in there as well.

About once every other year, I take all the removable panels off the dash and give them a good cleaning. Sometimes I go a little deeper and tear even more off. A lot of the fixes that I have done up under there have not been necessary, but have paid off in knoledge and not having to wait till something doesn't work. Even if you aren't good with wires, you can learn a lot from checking where wires go and what would not work if something was disconnected.

BigJim will most likely shake his cane at me for this posting, but really, some things you will never learn unless you take them apart and see what they do. Just don't get too carried away.