battery drain

[FJK1954]

Batteries tested, elec. system checks ok, alt.etc. ok, all cca on batteries good,but when i sit two or three hours truck drains just below starting ability. when i run rigmaster it sometimes keeps up, other times shuts down due to charging failure or low voltage. even when i turn everything off, inverter etc. i still have a drain...any thoughts?? it never used to do this. frank

 

[usaf6186]

Put an induction amp meter on the positive battery cable. This will show you if you have a current drain on the batteries. If there is no drain then you have a battery problem that did not show up in testing. did you do a load test? However I am not sure an induction amp meter will work on a DC circuit. Jerry

 

[greg334]

How old are the batteries?

I had a set that checked good but it was getting so bad that I could not leave the inverter on, let alone a load on it. I ended up having them checked with something more than what they have in the shops and one battery was bad so all were replaced.

These batteries were three years old.

 

[stamp11127]

You either have bad batteries and/or a load in the electrical system that is draining them. How were the batteries and electrical system checked?

 

[highway star]

Ditto Greg. I just replaced my batteries. A few weeks ago they were load tested and I was told they were fine. I decided the test was wrong and replaced them anyway. They were, indeed, bad.