My dash lights went out, any idea what it might be? on 1990 Nissan 300ZX

I checked all the fuses and some were burnt so I replaced them with the factory recommended types. Then when I turned on my headlights only the high beams would work, so I rechecked the fuses and the headlight one was burnt out. I replaced it again and the lights went out once more. I put in 15a instead of a 10a and everything seems fine, but my dash never came back on.

I recently put in a car stereo and I was having trouble with getting it to stay on, but that turned out to be a ground issue.

Asked by for the 1990 Nissan 300ZX
I would start by looking at the wires at the radio, I would suspect the stereo wiring is what is causing the fuses to blow. Nissan factory wiring is normally very reliable. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate