OK... here's a good one for ya, my truck RANDOMLY will act like it has a dead battery when I go to start it (relay chattering and very slow crank)... but let it sit for a min after trying to start it and it will start, sometimes cranking slow but other times like normal? battery tested fine at 710ca... any thoughts or ideas?

 

I had a problem once where my batt terminal was loose or stripped and it wouldn't get good contact when the starter engaged. I'd also check the battery ground.

 

ill be digging into that on on monday, full shakedown