Just to clarify, when does the battery get discharged? Is it when it is left overnight?
Or does it discharge while the engine is running?
If it loses charge while sitting, then it has an excessive parasitic draw or current drain. All circuits with a battery will have some amount of parasitic draw, but it can become excessive due to any number of faulty components. Like shorted window switch, or a glove box light staying on etc.
You will have to use a multimeter to check for the parasitic draw. This vehicle should have less than 30 milliamps of parasitic draw when everything is off.
Here is a helpful video of how to check and find what is causing the draw:
Let me know of any questions.
Monday, June 13th, 2022 AT 8:20 PM