1965 Chevy Impala starter

My impala would not start. I turned the key and nothing, so I bought a rebuilt starter and still nothing. Then I bought a starter switch and nothing. I checked the starter relay and I get juice at the terminals, but not the selinoid terminals on the starter, both ignition and starter wires are dead. I get juice at the positive cable going to the starter. Could the starter relay be bad even though the test light comes on when I touch the terminals. The wires seem ok going from the selenoid to the relay and ignition switch. I'm in need of advise. Any help will be appreciated because she has been sitting all winter and needs to get out. Steve