Hello i got a new amp and sub for my 95 civic ex. befor installing the amp system i want to put in a new deck. well my issue is the fact that i got it all wired in and its either i get radio or heat. not both. how do i fix this, and what is the issue. will i have to get a new harness?

 

The A/C controls and radio wiring are irrelevant to one another. Did you do the work yourself or paid someone/shop? Recheck your wire because something definitely went wrong.