Ranger16
Well-Known Member
You keep saying that the battery is good, but never say how you know? Don't go by a simple voltage test. You can get a good reading and still have a dead cell. Put a DVM on it and have someone attempt to crank it (load test). If you have a dead cell, the volts will drop to 9v or so.
"To add insult to injury, after I replace and installed the new starter, I bench tested the old one and it tested out OK."
I had the same thing happen many years ago. Bought a new battery. Car still would not start. Installed a new starter. Still no start. Got the old one back, still no start. Bench tested it and it was good. Reinstalled it and still no start. I was at the point that I could pull and reinstall it in :10 min. Neighbor came home from work and said "It's your battery". I said "it can't be, it's brand new". Long story short, it was the battery. It had a dead cell right off the shelf. Do yourself a favor and either load test it as I described or take it completely out of the equation by either bypassing it with the jumpers or replacing it with a known good battery. You can also test each cell with the DVM. You should see 2.1v per cell.
"To add insult to injury, after I replace and installed the new starter, I bench tested the old one and it tested out OK."
I had the same thing happen many years ago. Bought a new battery. Car still would not start. Installed a new starter. Still no start. Got the old one back, still no start. Bench tested it and it was good. Reinstalled it and still no start. I was at the point that I could pull and reinstall it in :10 min. Neighbor came home from work and said "It's your battery". I said "it can't be, it's brand new". Long story short, it was the battery. It had a dead cell right off the shelf. Do yourself a favor and either load test it as I described or take it completely out of the equation by either bypassing it with the jumpers or replacing it with a known good battery. You can also test each cell with the DVM. You should see 2.1v per cell.