Does A Bad Alternator Drain A Battery. Using a multimeter set to measure current amps should you have current flow between the battery and alternator with the rest of the cas electrical system disconnected then yes. Spoiler alertwhen an engine either cranks sluggishly or doesnt crank at all the issue is usually the battery.
An undercharging alternator will leave the battery flat which speeds up its failure. To know why it happens you have to first understand how a starter works in a car. An alternator with a good diode allows current to flow in one direction.
Can a bad alternator kill a new battery.
As described above a bad alternator will drain your Pacificas battery fast. Both of the questions mean the same and the answer is yes. This can cause the battery to discharge while the vehicle is parked. Remove the negative battery cable with the engine running.
