Hi All,
160K mile, NO aftermarket items, original owner. Replaced battery (costco) 3 times in the last 2 year. Last battery on June 2024, Car ran great for a few months. Sat for a week and battery is dead. Jump started, ran for a few weeks, sat couple of days and battery dead.
Alternator is about 5 year old (bought from Toyota Dealer).
1. Took out alternator, autozone tested and said ALL GOOD
2. Used a multi-meter and diod test is OK (shows reading when red wire is connected to body and COM is connected to BAT Post. Reverse the leads,and multimeter shows 0)
2a. while running the car, I see 14.59v at the battery/alternator terminal. over 10A using a clamp meter at the battery post.
3. set up multi meter in series to test amp draw. I saw 30mA, which seems like a normal draw from multiple forums in this group.
3a. Only DOM fuse has any impact on draw. All other fuses pull (engine bar and inside the car) shows 30mA draw.
4. When DOM fuse is pulled, it drops to 10mA), all other fuses have no impact on amp draw
5. No lights on (including trunk light, dom light etc)
Costco is saying something is drawing the battery and from all these tests and info from similar issues here, I don't think it is true.
Couple of Questions to the experts here:
1. with a 30mA draw, should the battery be draining if I don't drive the car for a week or two?
2. Any other things that I need to test if this is indeed a draw?
Appreciate any help on this as I am planning to give this car to my son as his first car.
John
160K mile, NO aftermarket items, original owner. Replaced battery (costco) 3 times in the last 2 year. Last battery on June 2024, Car ran great for a few months. Sat for a week and battery is dead. Jump started, ran for a few weeks, sat couple of days and battery dead.
Alternator is about 5 year old (bought from Toyota Dealer).
1. Took out alternator, autozone tested and said ALL GOOD
2. Used a multi-meter and diod test is OK (shows reading when red wire is connected to body and COM is connected to BAT Post. Reverse the leads,and multimeter shows 0)
2a. while running the car, I see 14.59v at the battery/alternator terminal. over 10A using a clamp meter at the battery post.
3. set up multi meter in series to test amp draw. I saw 30mA, which seems like a normal draw from multiple forums in this group.
3a. Only DOM fuse has any impact on draw. All other fuses pull (engine bar and inside the car) shows 30mA draw.
4. When DOM fuse is pulled, it drops to 10mA), all other fuses have no impact on amp draw
5. No lights on (including trunk light, dom light etc)
Costco is saying something is drawing the battery and from all these tests and info from similar issues here, I don't think it is true.
Couple of Questions to the experts here:
1. with a 30mA draw, should the battery be draining if I don't drive the car for a week or two?
2. Any other things that I need to test if this is indeed a draw?
Appreciate any help on this as I am planning to give this car to my son as his first car.
John