having some problems

1) my speedometre and my km counter only work some time.
Anyone have an idea of what might be causing this and how i could fix it.

2) also my licence plate light and dash board lights don't come on anymore when i turn on my head lights.
all i did from since the last time they were working was
clean my engine
convert to lazy eyes
changed my stock radio
what could have caused this? what should i check to fix this

any ideas

Fuses.

yea fuses, and when you hooked up your stereo you sure you didnt mess any wires up or anything? Could have shorted something out or something.

Fuses... mine when out 2 weeks ago... i had no light in my car, good thing my speedo is digital!