He guys, I am having a couple problems. First of all, my door light on my dash doesnt turn on when my car door is open or my Check engine light even though I have a bad o2, my headunit doesnt store my stations programmed, and my lights from my rear mirror (to look back) dont turn on either. Anyone have an idea what it could be?

 

for the door lights, there is a buton near the bottom of the door. (pushed in, thinks the door is still closed, thus not turning on) and for the CEL. turn the key to the accessories and see if the CEL light is on, if not. then you have a bad bulb behind it. as for the headunit, not sure, but could there be a loose wire that can be causing the mirror lights to not work.