Volvo Electrical

[DrivingZiggy]

Okay, so the first thing that began happening is that my starter seems to drag sometimes. Cleaned up the batteries and connections and that only helped a little. Then I got the new AGM batteries and that only helped a little. Cleaned all other electrical connections that I was able to find and that helped more, but seems to have worn off. Any guesses? It seems to only happen sometimes where the engine will make maybe one turn, then it doesn't keep going. But then I let off the key and when I try a second time, it seems like everything is hunky dory.

Also, Volvo's "lifeguard" or whatever it's called is kicking in after turning the engine off. And I mean in less than a minute. It should only kick in when the batteries get run down in order to preserve enough power to start. Seems to be the same as once upon a time when I had installed an isolator on an old truck for the same reason. And when it went bad, I just removed it and that fixed the problem. Anybody know if Volvo has an isolator and where it's located?