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Backround - 69 Cruiser with GM Crate small block, painless wiring kit, optima battery, 3 wire 90 amp alternator.
OK I determined the last alternator was bad, so I snagged this 90 amp unit from a caddy in the local yard. Works great, charges like a mad demon on crack. Yet when I shut her off for the night and come back in the morning, the battery is dead. WTF?? ASSumption? The alternator is sucking the battery dead while the motor is off.
My buddy tells me that I can get a plug with a diode that will not let the power go back into the alternator. OK that's great, but I don't really want to buy a whole plug and use it because I already had to tear the other one off to fit the mounting....(long story)
So my question is this, how much "diode" do I need to handle this set up? Which wire does it go on? Anyone??
OK I determined the last alternator was bad, so I snagged this 90 amp unit from a caddy in the local yard. Works great, charges like a mad demon on crack. Yet when I shut her off for the night and come back in the morning, the battery is dead. WTF?? ASSumption? The alternator is sucking the battery dead while the motor is off.
My buddy tells me that I can get a plug with a diode that will not let the power go back into the alternator. OK that's great, but I don't really want to buy a whole plug and use it because I already had to tear the other one off to fit the mounting....(long story)
So my question is this, how much "diode" do I need to handle this set up? Which wire does it go on? Anyone??