First, HAPPY THANKSGIVING to ALL..... My car has shown no symptoms but, today my wife went to start it after leaving church and it would not start. I attempted to crank it and it gave a sound like a loose battery terminal. Checked terminals tight and clean . I attempted to jump it with my diesel excursion but it gave the same sound and would not start. The voltage was 11.96 V before jumping and with jumper cables attached and excursion running voltage was the same. Excursion voltage with engine running and cables attached at battery was 14.2V. The windows would not go up after disconnecting jumper had to reattach to accomplish this. Took the battery home and retested BEFORE charging voltage at 12.3v. Took battery to Walmart for testing and it tested fine. Any ideas while I charge it before putting it back in and trying again. Could it be bad ground somewhere? or K40 relay?

Rod