Just a note:
The radio will not get reception unless an antenna is plugged in. And then ONLY when outdoors, not in a shop or garage (or tunnel, or under a bridge, or next to power lines etc. Ahhhh...the good old days)
And I agree with the guys here. Plug something into the aux port that you see. If I remember correctly some of the aux conversions powered up by turning the radio on, then off, then on again, or something like that.
Not completely true. Antenna needed yes. Outdoors false. Dependent on your location. My original AM-FM will get AM and FM signal in my shop and I am in a very rural area.. I would make sure you ave 12 volts key on at the radio along with a good ground. A known good antenna plugged in and correct speakers. Not knowing what Wards did there may be a switch or procedure for the radio to work. You may be on a MP3 AUX. mode.