Battery Drainage

I'm having issues with the battery draining if I do not drive my Tundra for several days. Any help on guiding me to the component that is causing the drain. Thanks

 

I replaced the battery, a years or so ago thinking that it was the issue.... The issue has continued. The entire truck is stock. I have not modified a thing. I will take a moment and introduce myself.

 

If original battery on your 2015, time to replace that. Could be a bad cell, even if newer.

If battery checks out ok (you need to do a load test), then you will need to start checking for parasitic drain somewhere. Not hard, but a bit tedious.

https://www.youtube.com/watch?v=lRcj1fQcWwU

 

My Tundra battery didn't last very long on any generation I had. I ended up buying an X2 and haven't had any problems since.

 

Check for rodent damage too, might not be charging when you do drive.