First, the parasitic drain problem is usually the batteries leaking in the siren under the cowl in front of the windshield. Use the search feature at the top of the page. To check your alternator, use a voltmeter and check it not running and running. If the voltage is higher when running it means the alternator is working. Did you clean all of the connecters, including where the ground cable connects to the front fender? I will post a link to help with problems.