The fact that you can turn the ignition without the key is probably in the key tumbler itself, and most likely have nothing to do with battery drain. The best way I know of to find your drain is with a simple "incandescent" test light. Not a neon or led tester. Disconnect the negative cable from the battery and connect the test light between the negative cable and the battery post. If you have a 12 volt (heavy) draw, the light will glow bright. Computer(s) memories only draw about 5 volts and will glow dimly at the light. First, with the key "off", disconnect the output terminal on the alternator to eliminate a possible diode problem in the alternator. If the light stays bright, start pulling fuses, one at a time, until the light goes dim. This will pinpoint the circuit that has the drain. Once you've found the circuit, it's a process of elimination on that circuit. Let me know what you find.
Tuesday, January 13th, 2009 AT 1:04 PM