If there is more than one WR, then I think it must be one of the kits with a starter relay.
Pull the relay out, connect a test light between terminal 85 (in the relay socket) and 86. Light should come on when the key is turned to 'start'. If not, the WR from pin 85 to the ignition switch is not installed right, or the ignition switch is bad, etc.
If that looks OK, momentarily jumper between terminal 30 and 87. Starter should crank. If not, then the heavier (I assume) WR is not properly installed (or the starter is bad or the power block is not getting power, etc).
If both tests pass, the relay is probably bad or not making good contact with the socket.
Divide and conquer.
Or in engineering terms, use a log
approach unless n is very small (and in this case it's not).