wiring up my 1966 corvair with an external ammeter and i have an ammeter question. i am going to run a wire from the battery + terminal to one side of the ammeter and from the other side of the ammeter to the battery terminal of the ignition switch. i am going to run a lead from the battery terminal of the ignition switch to the unswithed side of the fusebox and a wire from the igntion terminal of the ignition switch to the keyed side of the fusebox. assuming everything is off will the ammeter drain the battery. i am using an external regulated delco alternator with the hot lug of the alternator hooked to the hot lug on the starter through a fusible link.