My car won't stay on

Hannah, all these guys are on the right track. When you energize the starter by turning the key on the ignition to the "start" position, you take the ballast resistor out of the circuit. When you release the switch to the "run" position you put the ballast back in the circuit. If you`ve replaced the ballast resistor and the ignition switch already then you should start looking for the reason why you are not getting power to the run position of the switch. Check the connections in the back of the switch but also at the bulkhead connector. The center one (I believe) is the one that has the ignition switch connections going through it but it wouldn`t hurt to check them all. There should be a fusible link there too but if it went bad I don`t think you`d even have what you`ve got. Let us know what you do find.