dead start

[fireryan]

Sometimes after going to start my truck after it sits for a few days, it will crank for about 5 seconds and then the batterys are dead. I went and had the batterys checked today and they showed they were good. Any ideas what this may be?

[deucer]

You crank for 5 seconds then the batteries are dead? How did they check the batteries, voltage only? Did they put a load on the batteries when they tested them? If your batteries are good, the only other issue would be the starter. I'm not convinced your batteries are good. How do you finally get it started?

[fireryan]

They did do a load test on the batterys and it came back good. They way I get it started is to put a charger on it for awhile so it sounds like a no brainer to me but having the batterys come back good blows my mind.

[deucer]

When you do get it started do you still have a problem starting it when the engine is up to temp. and you shut down periodically? If not, I still say it is your batteries. If it does the same regardless of being started for the first time or the tenth time throughout the day then you either have dead cells in one or both batteries or your starter is about to lock up as it is toast.

When you grind on the starter for five seconds and the batteries are dead, do you actually hear the sound as it slows down, or does it stop cranking as if you took your hand off the key?

[Chango]

are they testing the batteries seperately? you get a false reading when not dis connecting them

[obsidian]

This IS a no brainer. Your batteries are toast. There is literally nothing else it can be.

Now if you're saying after you turn them over for 5 seconds then it doesn't start then your starter could be bad.

Your batteries are dead. Replace BOTH and you should be good to go.