Parts Cannon............ I like it. Is that what most dealers do?????First of all, STOP firing the 'Parts Cannon'!
Start from scratch. Fully charge the battery then 'load test' the battery with a load tester of the proper rating as the battery class.
If the battery checks out, then reinstall the clean battery with secure connections. Next, you will need a multi meter that reads mA. Find out what the acceptable 'parasitic draw' is for your car, probably not more than 50mA.
Disconnect the negative cable from the battery and connect the meter between the negative battery post and the clamp. Make sure all doors are closed and everything is turned off for at least 2 minutes.
If you find that you have excessive parasitic draw, you will have to play Sherlock Holmes and track each circuit by pulling fuses/circuit breakers to find the malcontent. Leave meter hooked up to the battery as stated previously.
Good luck. View attachment 177370