Compu Doc
Full Access Member
I have a load tester. Should I use it on the batteries before I start cranking on it or after?
Before you crank it load test the batteries. Disconnect the negative cable from each battery and then load test. Don't do what they do at Sears and that is they load test each battery with the cables connected and come up with the same result for each. Each time i have to remind them to disconnect one battery.
As others have said if it cranks fast then slow then fast again while all on one time cranking then it's the starter. How old are the batteries?. Anymore than 3-4 years old then consider replacing them as well.