Parasitic battery drain

Dead battery twice, battery tested ok, alternator ok. 2021 SR5.
Measured current draw when off at 0.9 amps.
Started pulling fuses to find the culprit.
Pulling the 30A tow fuse seems to stop the extra current draw. Both terminals are clear - must be in the connector or wiring harness. No recent work done except for undercoating a few weeks ago. I'm not towing anything soon - so at least not an emergency.
Thoughts?

 

Check the relays as well, saw an interesting TCCN where there was a bad relay that was causing a battery drain.

Good luck!

 

Clean both battery terminals, while clamps are out clean the inside of both. Make sure both clamps are tight when reinstalling..
Jot down ypur radio presets.

 

My 7 pin was also causing a current draw. I found one of the pins was bent. Straightened them all out and no more drain.

 

one owner?

 

3rd owner, bought in May

 

That could be your issue. Others might have tampered with the wire harness for any number of reasons.
https://www.tundras.com/threads/ultimate-tundra-wiring-diagrams-collection.81448/