Re Explorer: I'm thinking bad battery, but wondering why? It could just be old and not holding a charge. Something weird though. I heard a tick tock from the engine compartment when the car was off - as I was hooking up the charger. After a little investigation, it turned out to be coming from the two rear window wiper relays. I turned off the rear window wiper switch inside of the car (which the kids had probably kicked on) and the tick tock stopped. Whay was there power to these relays? Any ideas?
I'm gonna replace the battery and see how far that takes me. [not alternator - when running, it is charging.}
I'll try the positive post for the battery cut off - good idea.
PS - After lunch, called in "working from home due to car issues" - not a lie