Comment by toast0
1 day ago
> Whilst cranking, an ICE car will drop to around 6 volts (then maximum power is extracted according to thevenim's theorem).
> That means all computers etc will work at 6v.
Not necessarily all of them. Plenty of stuff will drop out while cranking; hopefully not the computers that run the fuel injection and ignition, though.
Interesting. I now know why my windshield wipers quit for a sec when my vw auto stop/start kicks back on.
Some accessories are disconnected while cranking so the battery can supply as much current as possible to the starter.
Ignition switches were turning off the wipers and other such extras in the 1980s. Probably longer but I'm not old enough to remember
Not a car engineer, but those motors can be pretty high A, so this could also just be a feature that helps the starter get as much power as it can while cranking.