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Try testing the solenoid without using the ignition switch. Turn the ignition switch to the on position. Jump the main terminal on the solenoid to front most of the small terminals on the solenoid. That should turn the engine over. If it turns over but won't start, then jump the main battery post on the solenoid to the rear most of the small terminals. That should allow juice to the ignition circuit. Then try cranking it again with the jumper to the front small terminal. If the car starts, be sure to disconnect the starter motor circuit jumper so as to release the starter from the flywheel.

If doing what I just mentioned doesn't crank the engine, then you have a bad solenoid, assuming that the starter motor, battery, and cables are OK. If it cranks but won't start using the jumpers then you have other engine problems.

If it does crank and start using the jumpers on the solenoid, but not with the ignition switch, then the ignition switch is bad.

Rev