Need some help, I installed my K&N filter in my car over the weekend and had the battery disconnected for a little while when installing it. When everything was done and hooked back up none of the guages worked. The theft light comes on solid along with the engine light, after I start the car (it runs fine) both lights go out. the guage lights will come on with the light switch but won't work. I do have a factory cd player in the car that isn't original (had to go to dealership to unlock) and I'm wondering if that might have something to do with it (It is working fine as well though). It's an 03 sunfire. Any help would be appreciated.

P.S. All fuses are good both in engine and dash, so don't ask if I checked , I have already researched as well and found nothing except checking a corroded ground at battery which I have done.