No Center Dash Lights When lights Turned On

Good Morning. I am having a dash light issue. My vehicle has a factory towing package on it. The vehicle kept blowing rear tail lights. I found that this stopped happening once I took the four pin plug for a trailer off the vehicle. Once I did this, now when I turn on my parking lights and headlights, I loose all my lights for the radio, and A/C controls. I have found no blown fuses, I have even tried a new turn signal switch and still nothing. This has me like really stumped. I am at a loss on this. What can I check next? I would rather fix myself than take to a over priced dealer. Thanks for any help you may have for me.