Close
Car Questions
RepairPal is your advocate for car care advice and guidance

What could be pulling down my battery over night other than the obvious things?

(2000 Mitsubishi Montero Sport)
in Tupelo, MS on July 22, 2014
Have a second new alternator on now and if I leave the cables on over night the battery is down. No lights, etc. on that we know of.
Displaying 2 answers & 0 comments
Popular Answer
of Auto Medic Inc on July 22, 2014
there are several things that can drain a battery:
if the battery is more than a couple of years old and has been dead multiple times, it may be sulfated to a point that it will not charge, it is best to have a battery charged off the vehicle and tested.
also any number of computers or modules on a vehicle can "stay awake" after the key is turned off. most are supposed to shut off after a few minutes. these are things you can't see, a seat module for example.
a parasitic draw test can be performed to check for these kinds of problems
on September 25, 2014
It is most likely your altenator
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. Learn more

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
We diagnosed the vehicle and obd says O2 1-2 heated sensor. We changed and the same code still appears. What must I d...
i want to know where is the turbine input shaft speed sensor
Didn't find what you were looking for?