new battery

2005 TJ, 4.0 I replaced the starter. Had the battery tested. Good. Cleaned the grounds. Ran a direct negative cable to the block. Ran a direct positive cable to the starter. Put on brass post connectors. Starts sometimes. Single click other times. Out of ideas.

Hi Jeep Community, I'm having some issues with with Jeep 2002 TJ. Recently, my 5 year old batter died. I bought a new battery and then noticed that the my battery gauge when the jeep was in idle wouldn't go past 12V. Since I had previously purchased and alternator, I took the one I had off and...