can the alternater make a car battery go flat when the car is turned off?
and can the alternater make the car run really badly
and can the alternater make the car run really badly
the_boy_toy
Favorite Answer
On modern cars yes. If the alternator or starter have an internal short, then it is possible for the battery to be drained.
bigrocks65
Yes it can drain the battery if shorted but very rare to happen.if your battery is going dead over night check somewhere else first" trunk light glove box vanity mirrors or just a dead cell in battery"
meev182
just about any electrical component/circuit COULD make a battery die. test the battery and alternator first. if both of them test out good, test for a parasitic drain.
Anonymous
yes , to test the alternator remove the main + lead overnight then check bat. for proper volts in morn.
John
nope. all it dose is charge the battery when the car is running