I have a 71 duster 440 4spd. Turning the ignition switch to the start position does nothing, but if I turn it to the run position and bypass the starter relay and run a hot wire to the positive terminal on the coil it starts right up and runs find after I remove the hot wire to the coil. I have a yellow wire which is hot when the switch is turned to the start position. The yellow wire is plugged to one of the two spade terminals on the relay (which I just replaced) If I jump the yellow wire to the solinoid terminal and turn the switch to start it turns over? I need some help.