Nissan Repair: 1996 Nissan 200sx SE-R lights are out, 1996 nissan 200sx, stereo wiring harness

Question
I have a Nissan 200sx SE-R 2.0L when I turn on my head lights, my dash lights as well as my rear running lights or my license plate lights do not come on  my head lights still work (and brights) and my turn signals and my when I put my on brakes theses lights work.  I do have a aftermarket radio in it but I’ve had one in there for probably three years now. I just recently upgraded my radio and put a new one in and right after the lights went out. Yea a know that their probably related but this is the third aftermarket radio I’ve put in my car and the lights have never gone out on me until now.  Any help in figure out this problem is very needed and appreciated.

Answer
Joshua,

Nissan uses a floating ground on the radio.  Power off and it is a ground.  Power on and it turns into power.  If it were me I would get a stereo wiring harness adapter and solder it in.  When you do you will find the offending wire.  Also, check the fuses since one could have blown.  If all is fine then this is just a concidence and the headlight switch has worn out.