Dashboard lights out?

A few weeks ago I installed a new radio I got for christmas. Once all the connections were made the radio worked perfect. When I turned on my lights at night, the dashboard lights didn't come on and my tail lights were out. I checked all of the fuses and the one for the tail lights was blown. I replaced it two times, but it instantaneously blew each time. I upped it to a 20amp fuse and now the tail lights have no problems. As for the dash lights, they are still out. The idiot lights still work. The lights for the speedometer, fuel guage, and temperature gauge don't light up. I pulled out the dash console and replaced the two bulbs behind these dials. This didn't fix it. I have checked and replaced everything I can think of. What can I do to fix this?

Thanks for your time.