He didn't tell you to pull connector out of the bulb. He said pull the connector off the back of the headlight switch.
"giving up the ghost" is just a saying. He's saying your 40+ year old switch might be dead.
If you disconnect the switch and your current draw disappears, you may have found your problem.
Can I just reach up under the dash to pull the connector? If it is a problem, does the dash have to be removed to remove the switch?
Also, the alternator drawing 0.5 amp... how do I test that? Could that be on because the ignition switch is not really off? The key can be removed no matter what position the switch is in... car keep running. It is very hard to actually get it into what I think is the "Off" position.
