QUOTE(Roman Catholic @ Feb 15 2020, 04:18 PM)
Can anyone explain this ?
Before a battery replacement was done for a vehicle with a dead battery, it was jump-started and that managed to crank the vehicle up.
So with the vehicle turned on, the jumpers were removed following its proper sequence.
Now when the (-)ve terminal to the dead battery was removed from the dead battery's post, the vehicle immediately stalled.
Whatever ever happened to the saying that the alternator takes over and provides current to the vehicle and the battery plays no further part after that ?
P/S : After a new battery was installed, the starter snd alternator were tested and they were in excellent condition.
thats wrong thought....to give an analogy...consider a bicycle with lamp powered with rechargeable battery and dynamo.
when one cycles slow, obviously the dynamo doesnt have the power to lite up the lamp, hence power is drawn from the battery, when the speed is up, the lamps gets the power from the dynamo.
Hence when a car is is slow motion or idle, most of the time, battery is needed unless, you ramp the engine at more than 2000rpm to keep the car alive.
hope that helps