Just a "Clicking" noise indicates to me that the Solenoid isn't pulling the Bendix in hard enough.
When the Solenoid is working correctly, there should be a very loud "Clicking" noise as the Slenoid is moving a distance as it pulls the Bendix into contact with the Ring Gear on the Flywheel.
This noise isn't generally heard as just before the Bendix is fully pushed into contact, the contacts at the other end of the Solenoid is creating the Electrical Contact to start the Starter Motor turning.
Sounds to me like either a bad Ground, or a bad electrical contact in the Positive Cable, or a flat battery.
Bruce.
