1963 Ford Thunderbird RADIO INSTALLATION

"I am attempting to install a Custom Autosound Radio in my 63 T-bird. The original setup only had two wires from the old AM radio and the speaker wires. A black wire and a blue wire. The black wire from the old radio connected to a black wire in the wiring harness. The blue wire from the old radio connected to a blue wire in the wiring harness. If I put a test light on the black wire of the wiring harness it will light up if the ignition is on. If I put a test light on the blue wire of the wiring harness I do not get any response whether the ignition is on or off. I did connect the wire from the new radio that was labeled ignition to the black wire of the wiring harness. I connected wire that was labeled battery from the new radio to the blue wire of the wiring harness. I took the ground wire from the new radio and put it to a suitable ground. I don't get any power at all with this connection although I did find out if you accidently touch the ground wire against the black wire from the wiring harness it does blow the radio fuse. IIf you have any ideas I would really appreciate it.

Thanks,
Tom