I have a 95 F-150 XL that came with a AM/FM Radio. The other day we swapped it out for an aftermarket CD Player the previous owner gave me, it powered up fine but the unit itself was broke so I decided to buy another CD player and put the old Radio back in for now. Then the old radio wouldnt turn on. When I bought the new radio, it wouldnt turn on either. My wiring is correct and Ive checked all the fuses. Is there anything else I can check?