Yaris won`t start..3rd Battery

[B.B._07]

It sounds like you have a parasitic draw on the battery that is killing the battery if you leave the car unused for a few days. You can check for a parasitic draw by using a good multi-meter or VOM and pulling fuses to isolate the draw. Here's a good video that explains the test:

https://www.youtube.com/watch?v=eXX8TfzRAKk

You can rule out your alternator by checking the voltage across the battery terminals with the car running. At idle with a few electrical accessories like the headlights and heater fan turned on you should have somewhere around 13.5V.

[bgolash]

Originally Posted by B.B._07

I sounds like you have a parasitic draw on the battery that is killing the battery if you leave the car unused for a few days. You can check for a parasitic draw by using a good multi-meter or VOM and pulling fuses to isolate the draw. Here's a good video that explains the test:

https://www.youtube.com/watch?v=eXX8TfzRAKk

You can rule out your alternator by checking the voltage across the battery terminals with the car running. At idle with a few electrical accessories like the headlights and heater fan turned on you should have somewhere around 13.5V.

Thank you...Great Information.