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I built a (the) grid charger for my insight. I've had a couple of unrelated problems preventing me from getting it going for 36 hours straight, but on my first try I got it on for about 22 hours.
When I flipped the ima back on and turned the car on, it appeared to have no battery power whatsoever, but within a mile of driving, it kind of filled up by quarters at a time until it was full. I cleared the CEL codes for that trip and kept ima on the whole time and didn't get CEL again. The IMA light, however, remained on.
I went to a conference this weekend where it was awful nippy, and apparently I'd left my dome light on. I still don't know exactly what the order of electrical operations are in the car (does the 12v battery power the ignition relay?), but the dead 12v prevented me from starting the car. I got jumped and the ima battery showed completely dead, but then again it jumped up to full roughly 1/4 of the gauge at a time, and given its immediate ability to assist, I believed the gauge. weird.
Anyway, after that ordeal, even the IMA light went away and stayed away, which I would consider good news (must have been the 12v battery retaining the ECM's memory - I wonder if there were any good/bad "habits" it had forgotten after that as well.
Again, not totally familiar with how smart or dumb the car is) I plugged in the car when I got home the other night, and this morning marked what would have been 36 hours, but my AC side fuse (1A fast blow) had blown at some point. Time to up it to 10a per someone's suggestion (perhaps it was RobertSmall's), cautioning that the 1A fuse would blow constantly.
When I measured the battery leads from the plug I made (one goes to - terminal, one goes to + side of precharge resistor), the voltmeter read 166v, which I would consider good news and would lead me to believe the fuse blew relatively late in the process, or even by the time the batteries had all topped off as much as they would.
Haven't driven it yet since this, but I unplugged the charger. I'll measure the voltage again when I get (bike) home from work and see if it has changed after a day of sitting there, but it may have already been sitting there for a good chunk of time depending on when the fuse blew. The air in the car was slightly warmer that the balmy morning air today, so hopefully that also points to a fuse blow late in the charge.
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