[Tech II]

Like brcidd said, the bulb is working correctly....this is a bulb check with the key just on, and it should go out when started if the alternator is charging....

You have changed just about everything, cables, bat, and alternator......

You should double check the charging system, when the engine is WARM....

Check bat cold.....with key out of ignition and nothing on, fully charged bat should be 12.6 volts with voltmeter across battery....

Start vehicle, and should read over 14.0 volts.....also does voltmeter read same as gauge?.........

let vehicle get to normal op temp...turn rear defog on, lights on, and blower on hi.....this "loads" the system.....reading may dip below 12.0 volts......rev engine to 2000 rpms.....reading should go above 13.0 volts....if you get these readings, charging system should be ok.....

If vehicle is not started for several days or more and then needs a jump, I would suspect a parasitic draw....